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Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 481096 itfreetraining
Types of firewall  | network firewall security | TechTerms
 
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Learn different types of firewall, types of firewall software, types of hardware firewall, different types of firewalls, types of firewalls, types firewall, types of firewalls in network security, different types of hardware firewalls, types of firewall, different types of firewall, firewall configuration types, firewall types, 7 types of firewall, types of firewall in network security, types of firewall with diagram, firewall and types of firewall, types of network firewalls, firewall and its types, what is firewall and types of firewall, types of firewall architecture, types of firewall in networking, different types of firewall in network security, what is firewall and write the types of firewall, types of firewall attacks, firewall and types, firewall types and configuration, different types of firewalls and their functions. Follow us on Facebook: https://www.facebook.com/DGTechTerms/ Follow us on Twitter: https://twitter.com/Technical_Terms Firewalls protect our computers from internet hackers. Internet hackers can steal our bank details from our computers and can reduce our bank balance from 1000s of dollars to 0 in seconds. So, firewall is must in a computer / computer network. Starting with packet filtering firewall. Suppose, I am downloading a file from internet. When the data-packet arrives a packet-filtering firewall, it only checks sender’s and receiver’s IP address and the port number. If the everything is OK, then data packet is allowed to pass through packet-filtering firewall and then to my computer. This checking process is done as per rules written in a list called access control list. The only limitation (caveats) of packet filtering firewall is that it do not checks the data portion, i.e. Payload, of the data packet. So, a hacker could send some malicious data packed in this payload section. The 2nd one is application / proxy firewall: proxy firewall do not let the web server know which computer actually wants to visit the requested website, i.e. proxy firewall hides us from the attackers in internet. Since, the application firewalls also check the data contents of the received data packet so they are generally much slower than packet-filtering firewalls. 3rd is Hybrid firewalls: Hybrid firewalls combines packet filtering firewall and application firewall in series to enhance the security. If they are connected in parallel then the security of the connection will be reduced to the parameters defined by the packet filtering firewall, i.e. application firewall will be of no use if the two firewalls are connected in parallel. For this reason, hybrid firewalls use packet filtering and application firewall in series. -~-~~-~~~-~~-~- Please watch: "Computer Network Administrator – 5 Important Questions and answers" https://www.youtube.com/watch?v=4mKcQ1_vQjc -~-~~-~~~-~~-~-
Views: 246788 TechTerms
How SSL works tutorial - with HTTPS example
 
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How SSL works by leadingcoder. This is a full tutorial how to setup SSL that requires client certificate for reference: http://www.windowsecurity.com/articles/Client-Certificate-Authentication-IIS6.html .
Views: 1413326 tubewar
Network Security - Use Crypto API to Sign and Verify
 
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Fundamentals of Computer Network Security This specialization in intended for IT professionals, computer programmers, managers, IT security professionals who like to move up ladder, who are seeking to develop network system security skills. Through four courses, we will cover the Design and Analyze Secure Networked Systems, Develop Secure Programs with Basic Cryptography and Crypto API, Hacking and Patching Web Applications, Perform Penetration Testing, and Secure Networked Systems with Firewall and IDS, which will prepare you to perform tasks as Cyber Security Engineer, IT Security Analyst, and Cyber Security Analyst. course 2 Basic Cryptography and Programming with Crypto API: About this course: In this MOOC, we will learn the basic concepts and principles of cryptography, apply basic cryptoanalysis to decrypt messages encrypted with mono-alphabetic substitution cipher, and discuss the strongest encryption technique of the one-time-pad and related quantum key distribution systems. We will also learn the efficient symmetric key cryptography algorithms for encrypting data, discuss the DES and AES standards, study the criteria for selecting AES standard, present the block cipher operating modes and discuss how they can prevent and detect the block swapping attacks, and examine how to defend against replay attacks. We will learn the Diffie-Hellman Symmetric Key Exchange Protocol to generate a symmetric key for two parties to communicate over insecure channel. We will learn the modular arithmetic and the Euler Totient Theorem to appreciate the RSA Asymmetric Crypto Algorithm, and use OpenSSL utility to realize the basic operations of RSA Crypto Algorithm. Armed with these knowledge, we learn how to use PHP Crypto API to write secure programs for encrypting and decrypting documents and for signing and verify documents. We then apply these techniques to enhance the registration process of a web site which ensures the account created is actually requested by the owner of the email account. Develop Secure Programs with Crypto API In this module, we learn how to use Crypto API to write secure programs for encrypting and decrypting documents, and for signing and verify documents. We then apply the techniques to enhance the registration process of a web site which ensures the account created is actually belonging to the owner of the email account the request profile. Learning Objectives • Develop secure programs with Crypto API for encryption, authentication, and integrity checking • Enhance the registration process of the web site by using the crypto api • Create and utilize the Crypto API to sign and verify documents Subscribe at: https://www.coursera.org
Views: 60 intrigano
INTRODUCTION TO DIGITAL SIGNATURES IN HINDI
 
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Find the notes of DIGITAL SIGNATURES in this link - https://viden.io/knowledge/cse-digital-signature-ppt?utm_campaign=creator_campaign&utm_medium=referral&utm_source=youtube&utm_term=ajaze-khan-1
Views: 105551 LearnEveryone
NETWORK SECURITY - MD5 ALGORITHM
 
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The MD5 algorithm is a widely used hash function producing a 128-bit hash value. Step 1. Append Padding Bits. The message is "padded" (extended) so that its length (in bits) is congruent to 448, modulo 512. ... Step 2. Append Length. ... Step 3. Initialize MD Buffer Step 4. Process Message in 16-Word Blocks. ... Step 5. Output.
Will Quantum Computers break encryption?
 
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How do you secure messages over the internet? How do quantum computers break it? How do you fix it? Why don't you watch the video to find out? Why does this description have so many questions? Why are you still reading? What is the meaning of life? Facebook: https://www.facebook.com/frameofessence Twitter: https://twitter.com/frameofessence YouTube: https://www.youtube.com/user/frameofessence CLARIFICATIONS: You don't actually need a quantum computer to do quantum-safe encryption. As briefly mentioned at 7:04 , there are encryption schemes that can be run on regular computers that can't be broken by quantum computers. CORRECTIONS: [2:18] Technically, you can use any key to encrypt or decrypt whatever you want. But there's a specific way to use them that's useful, which is what's shown in the video. [5:36] In RSA, depending on exactly what you mean by "private key", neither key is actually derivable from the other. When they are created, they are generated together from a common base (not just the public key from the private key). But typically, the file that stores the "private key" actually contains a bit more information than just the private key. For example, in PKCS #1 RSA private key format ( https://tools.ietf.org/html/rfc3447#appendix-A.1.2 ), the file technically contains the entire public key too. So in short, you technically can't get the public key from the private key or vice versa, but the file that contains the private key can hold more than just the private key alone, making it possible to retrieve the public key from it. Video links: Encryption and HUGE numbers - Numberphile https://youtu.be/M7kEpw1tn50 The No Cloning Theorem - minutephysics https://youtu.be/owPC60Ue0BE Quantum Entanglement & Spooky Action at a Distance - Veritasium https://youtu.be/ZuvK-od647c Sources: Quantum Computing for Computer Scientists http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC Random person talking about Quantum MITM attacks http://crypto.stackexchange.com/questions/2719/is-quantum-key-distribution-safe-against-mitm-attacks-too The Ekert Protocol (i.e. E91) http://www.ux1.eiu.edu/~nilic/Nina's-article.pdf Annealing vs. Universal Quantum Computers https://medium.com/quantum-bits/what-s-the-difference-between-quantum-annealing-and-universal-gate-quantum-computers-c5e5099175a1 Images, Documents, and Screenshots: Post-Quantum Cryptography initiatives http://csrc.nist.gov/groups/ST/post-quantum-crypto/cfp-announce-dec2016.html http://pqcrypto.eu.org/docs/initial-recommendations.pdf Internet map (Carna Botnet) http://census2012.sourceforge.net/ Quantum network maps https://www.slideshare.net/ADVAOpticalNetworking/how-to-quantumsecure-optical-networks http://www.secoqc.net/html/press/pressmedia.html IBM Quantum http://research.ibm.com/ibm-q/ Music: YouTube audio library: Blue Skies Incompetech: Jay Jay Pamgaea The House of Leaves Premium Beat: Cutting Edge Technology Second Time Around Swoosh 1 sound effect came from here: http://soundbible.com/682-Swoosh-1.html ...and is under this license: https://creativecommons.org/licenses/sampling+/1.0/
Views: 671920 Frame of Essence
IAME - TRANSACTION IDENTIFICATION PROTOCOL!
 
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The IAME identity network is a decentralized identification system created for the Blockchain ecosystem. So, from the first reading, you say that nothing concrete is not clear from this sentence, but let's figure it out. IAME is the identification system for the Blockchain P2P transaction. IAME relies on its own fragmented (fragment-based) identification algorithm, according to which identity documents are fragmented into thousands of illegible parts, and the verification process is decomposed to hundreds of thousands of people. The IAME identity network consists of: a client, a distribution server, a verification server, a write block chain, an identity server. :::::::::::::::::::::::::::::::::::::::: ⚡ WEB: https://iame.io/ ⚡ WHITEPAPER: https://iame.io/res/180301-IAME-White-Paper-en.pdf ⚡ TELEGRAM: https://t.me/IAME_identity ⚡ TWITTER: https://twitter.com/@iameidentity ⚡ FACEBOOK: https://www.facebook.com/IAMEIdentity/ ⚡ MEDIUM: https://medium.com/@IAMEIdentity ⚡ LINKEDIN: https://www.linkedin.com/company/iameidentity ⚡ VIMEO: https://vimeo.com/iameidentity ⚡ GITHUB: https://github.com/iameidentity :::::::::::::::::::::::::::::::::::::::: 🐦My Bitcointalk Username: korolev3245137 🐦My Bitcointalk URL: https://bitcointalk.org/index.php?action=profile;u=1952926 🐦My ETH Address: 0x4C8a59eA64760fC276Ec8472B39C542eA20E686E 🐦My Telegram: @korolev32
Views: 57 Blockchain boxroom
What's Up With Group Messaging? - Computerphile
 
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Why encrypted group messaging isn't as secure as point to point. Dr Mike Pound explains this ongoing problem. Instant Messaging & the Signal Protocol: https://youtu.be/DXv1boalsDI Double Ratchet Messaging Encryption: https://youtu.be/9sO2qdTci-s Relevant paper: https://eprint.iacr.org/2017/666.pdf https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 173250 Computerphile
MD5 Encryption - Hindi
 
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MD5 Encryption (MD5 एन्क्रिप्शन) RSA डेटा सिक्योरिटी प्रयोग करके स्ट्रिंग के MD5 हैश की गणना करना, Inc.'s MD5 मैसेज-Digest Algorithm, और वो हैश रिटर्न करता है (यह एन्क्रिप्टिंग टेकनीक का एक तरीका है)। Syntax : string md5 ( string $str [, bool $raw_output = false ] ) एन्क्रिप्टिंग पासवर्ड्स में प्रयोग करता है और उनको डेटाबेस में संचित करता है।
INTRODUCTION TO CRYPTOGRAPHY IN HINDI
 
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find relevant notes at-https://viden.io/
Views: 61152 LearnEveryone
Network Security - Basic Concepts Definitions & Types of Attacks
 
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This is a introductory video to a domain of Information technology that is Network security. Definition of Network Security: Network security is protection of the access to files, directories and information in a computer network against hacking, misuse and unauthorized changes to the system. In this video tutorial the basics of Network security, some definitions, terms and concepts. We've also covered some types of attacks that take place when Network security is not implemented properly. If you like the video give it a thumbs up and also share it with your friends. Do subscribe to our channel as you will get notified when we upload new video tutorials. If you have any suggestions or tips for us do post them in the comments section below we'll be happy to apply them for you. Peace Download my FREE Network Security Android App - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- [email protected] For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 139196 Simple Snippets
16. Side-Channel Attacks
 
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MIT 6.858 Computer Systems Security, Fall 2014 View the complete course: http://ocw.mit.edu/6-858F14 Instructor: Nickolai Zeldovich In this lecture, Professor Zeldovich discusses side-channel attacks, specifically timing attacks. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 12089 MIT OpenCourseWare
13. Network Protocols
 
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MIT 6.858 Computer Systems Security, Fall 2014 View the complete course: http://ocw.mit.edu/6-858F14 Instructor: Nickolai Zeldovich In this lecture, Professor Zeldovich discusses the Kerberos authentication service. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 81977 MIT OpenCourseWare
JAVA 2012 IEEE Project A Secret-Sharing-Based Method for Authentication of Grayscale Document Images
 
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To Get any Project for CSE,IT ECE,EEE Contact Me @9966032699,8519950799 or mail us - [email protected]­m-Visit Our WebSite www.liotechprojects.com,www.iotech.in A new blind authentication method based on the secret sharing technique with a data repair capability for grayscale document images via the use of the Portable Network Graphics (PNG) image is proposed. An authentication signal is generated for each block of a grayscale document image, which, together with the binarized block content, is transformed into several shares using the Shamir secret sharing scheme. The involved parameters are carefully chosen so that as many shares as possible are generated and embedded into an alpha channel plane. The alpha channel plane is then combined with the original grayscale image to form a PNG image. During the embedding process, the computed share values are mapped into a range of alpha channel values near their maximum value of 255 to yield a transparent stego-image with a disguise effect. In the process of image authentication, an image block is marked as tampered if the authentication signal computed from the current block content does not match that extracted from the shares embedded in the alpha channel plane. Data repairing is then applied to each tampered block by a reverse Shamir scheme after collecting two shares from unmarked blocks. Measures for protecting the security of the data hidden in the alpha channel are also proposed. Good experimental results prove the effectiveness of the proposed method for real applications.
Views: 1062 LT LIOTechprojects
How to Use Java Cryptography API Securely
 
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Mansi Sheth, Security Researcher, Veracode Inc Are you overwhelmed by the overabundance of choices provided by the Java Cryptography API when choosing an encryption algorithm? Are you on top of all the latest happenings in cryptographic communities and know which cryptographic primitives can be broken and how? Due to time constraints, do you find yourself copy/pasting from the internet, hoping and praying that it’s secured? If any of your answers are “yes,” come to this session. It goes over all cryptographic primitive: RNGs, encryption/decryption algorithms, HMACs, and so on. The presentation points out areas that require careful attention, helps you make correct algorithmic and keying material choices, and provides plenty of code examples showing correct and incorrect usages.
Views: 2351 Java
DEF CON 23 - Eijah - Crypto for Hackers
 
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Hacking is hard. It takes passion, dedication, and an unwavering attention to detail. Hacking requires a breadth of knowledge spread across many domains. We need to have experience with different platforms, operating systems, software packages, tools, programming languages, and technology trends. Being overly deficient in any one of these areas can add hours to our hack, or even worse, bring us total failure. And while all of these things are important for a well-rounded hacker, one of the key areas that is often overlooked is cryptography. In an era dominated by security breaches, an understanding of encryption and hashing algorithms provides a tremendous advantage. We can better hone our attack vectors, especially when looking for security holes. A few years ago I released the first Blu-Ray device key, AA856A1BA814AB99FFDEBA6AEFBE1C04, by exploiting a vulnerability in an implementation of the AACS protocol. As hacks go, it was a simple one. But it was the knowledge of crypto that made it all possible. This presentation is an overview of the most common crypto routines helpful to hackers. We'll review the strengths and weaknesses of each algorithm, which ones to embrace, and which ones to avoid. You'll get C++ code examples, high-level wrapper classes, and an open-source library that implements all the algorithms. We'll even talk about creative ways to merge algorithms to further increase entropy and key strength. If you've ever wanted to learn how crypto can give you an advantage as a hacker, then this talk is for you. With this information you'll be able to maximize your hacks and better protect your personal data. Speaker Bio: Eijah is the founder of demonsaw, a secure and anonymous content sharing platform, and a Senior Programmer at a world-renowned game development studio. He has over 15 years of software development and IT Security experience. His career has covered a broad range of Internet and mid-range technologies, core security, and system architecture. Eijah has been a faculty member at multiple colleges, has spoken about security and development at conferences, and holds a master’s degree in Computer Science. Eijah is an active member of the hacking community and is an avid proponent of Internet freedom.
Views: 48182 DEFCONConference
Network Security - Basic Cryptography and Programming with Crypto API: Course Overview
 
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Fundamentals of Computer Network Security This specialization in intended for IT professionals, computer programmers, managers, IT security professionals who like to move up ladder, who are seeking to develop network system security skills. Through four courses, we will cover the Design and Analyze Secure Networked Systems, Develop Secure Programs with Basic Cryptography and Crypto API, Hacking and Patching Web Applications, Perform Penetration Testing, and Secure Networked Systems with Firewall and IDS, which will prepare you to perform tasks as Cyber Security Engineer, IT Security Analyst, and Cyber Security Analyst. course 2 Basic Cryptography and Programming with Crypto API: About this course: In this MOOC, we will learn the basic concepts and principles of cryptography, apply basic cryptoanalysis to decrypt messages encrypted with mono-alphabetic substitution cipher, and discuss the strongest encryption technique of the one-time-pad and related quantum key distribution systems. We will also learn the efficient symmetric key cryptography algorithms for encrypting data, discuss the DES and AES standards, study the criteria for selecting AES standard, present the block cipher operating modes and discuss how they can prevent and detect the block swapping attacks, and examine how to defend against replay attacks. We will learn the Diffie-Hellman Symmetric Key Exchange Protocol to generate a symmetric key for two parties to communicate over insecure channel. We will learn the modular arithmetic and the Euler Totient Theorem to appreciate the RSA Asymmetric Crypto Algorithm, and use OpenSSL utility to realize the basic operations of RSA Crypto Algorithm. Armed with these knowledge, we learn how to use PHP Crypto API to write secure programs for encrypting and decrypting documents and for signing and verify documents. We then apply these techniques to enhance the registration process of a web site which ensures the account created is actually requested by the owner of the email account. Module 1 - Basic Cryptography In this module we learn the basic concepts and principles of crytography, introduce the basic concept of cryptoanalysis using mono-alphabetic substitution cipher as an example, and discuss the one-time-pad and quantum key distribution concepts. Learning Objectives • Compose secure program with Crypto API for encryption, authentication, and integrity checking • Understand terminologies of basic cryptography • Understand Kerchhoff Principle • Apply cryptoanalysis techniques on mono-alphabetic ciphers • Explain why one time pad is strongest and understand how quantum key can be distributed
Views: 159 intrigano
The Curse of Cross-Origin Stylesheets - Web Security Research
 
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In 2017 a cool bug was reported by a researcher, which lead me down a rabbit hole to a 2014 and even 2009 bug. This provides interesting insight into how web security research looks like. cgvwzq's Bug (2017): https://bugs.chromium.org/p/chromium/issues/detail?id=788936 filedescriptor's Bug (2014): https://bugs.chromium.org/p/chromium/issues/detail?id=419383 scarybeasts' Bug (2009): https://bugs.chromium.org/p/chromium/issues/detail?id=9877 GynvaelEN: https://www.youtube.com/user/GynvaelEN Efail Stream: https://www.youtube.com/watch?v=VC_ItSQaUx4 -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #SecurityResearch
Views: 54109 LiveOverflow
Implementing SSL in asp net web application   Part 101
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2012/12/implementing-ssl-in-aspnet-web.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-101-implementing-ssl.html All ASP .NET Text Articles http://csharp-video-tutorials.blogspot.com/p/free-aspnet-video-tutorial.html All ASP .NET Slides http://csharp-video-tutorials.blogspot.com/p/aspnet-slides.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss about 1. Understand the term self-signed certificates 2. Creating self-signed certificates 3. Configuring an asp.net web application to use SSL, that is use HTTPS instead of HTTP 4. Importing and exporting certificates What are self signed certificates A self-signed certificate is an identity certificate that is signed by its own creator. Certificates are signed by Certificate Authority. In general self signed certificates are fine for testing purposes and not for production use. Creating self-signed certificates There are several ways to create self signed test certificates. Let us explore 2 of the easier options available. The easiest and simpler approach is to use IIS to create these certificates. In IIS 7.5 1. Click on the "Server Name" 2. Double click "Server Certificates" feature 3. Click on "Create Self Signed Certificate" link, under "Actions" 4. Specify a friendly name for the certificate and click OK. The friendly name is not part of the certificate itself, but is used by the server administrator to easily distinguish the certificate. The generated test certificate, is also automatically installed into the certificate store. MakeCert.exe tool can be used as another way to generate, test certificates. The following link from microsoft explains, various options that can be used with this tool. This is a command line tool and must be run from visual studio command prompt. http://msdn.microsoft.com/en-us/library/bfsktky3.aspx Makecert -r -pe -n "CN=YourComputerName" -b 01/01/2000 -e 01/01/2100 -ss my -sr localMachine -sky exchange -sp "Microsoft RSA SChannel Cryptographic Provider" -sy 12 Note: Replace YourComputerName, with the name of your computer. Associating an asp.net web application with a specific certificate Add HTTPS site binding, if it is not already present 1. Open IIS 2. Expand the "Server Name" 3. Expand "Sites" 4. Select "Default Web Site" 5. Click "Binding" under "Edit Site" in "Actions" pane. 6. In the "Site Bindings" window, Click "Add" 7. Select Type = "https" and the SSL Certificate and click "OK" 8. Click "Close" on "Site Bindings" window At this point, you will be able to access your application using both HTTP and HTTPS protocol. When the site is accessed over HTTPS, you may receive a browser warning about the authenticity of the website. In a later video session we will discuss about resolving this. If you want to dis-allow, access over HTTP protocol there are 2 ways First Way: Remove HTTP binding at the IIS Server level. This option will prevent all the web applications, running on that server to use only HTTPS binding. Second Way: Let both the bindings be available at the server level and configure SSL settings at an application or web site level. 1. Select your web application in IIS 2. Double click "SSL Settings" from the features window 3. Make sure "Require SSL" checkbox is checked. 4. Click "Apply" under "Actions" pane Now, if you try to access the application using HTTP instead of HTTPS, you will get an error HTTP Error 403.4 - Forbidden The page you are trying to access is secured with Secure Sockets Layer (SSL) Use Import and Export feature of IIS to import and export certificates
Views: 77129 kudvenkat
How do SIM Cards work? - SIMtrace
 
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In this video we use SIMtrace to intercept the communication between the phone and SIM card to understand how that works. This is part 1 in a series introducing mobile security. Vadim Yanitskiy: https://twitter.com/axilirator Osmocom: https://osmocom.org/ -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #MobileSecurity
Views: 648336 LiveOverflow
Node Authentication Tutorial | Creating a User Based App from Scratch – Part 1
 
30:59
🚀Support Chris Courses with Patreon: https://www.patreon.com/chriscourses 🖥Professional Web Development Services from Chris: https://resovere.com/ Learn the basics behind creating a user based login system with Node, Express, and Passport.js. When it comes to creating a user based app, authentication is a tricky topic to fully understand. What is authentication, what does it do, and why do I need it in the first place? These are all valid questions that many beginners, including myself, have had at one point in time when learning about authentication.  I recall that when I was first trying to understand the topic, the whole process seemed mysterious, vague, and difficult to understand (and learning it on my own, it indeed was). This video aims to dispel any mystery or difficulty that a beginner may associate with authentication, through a comprehensive screencast in which every step of the process is explained along the way. Video Git Repo: ----------------------------- https://github.com/christopher4lis/express-cc Node Authentication Process: ----------------------------------------------------- // Add our boilerplate // 1.x Git clone express-cc repo // 2.x Run yarn / npm install // Create a new user in the database // 1.x Create a form within a view // 2.x Create route that'll process the form's post request // 3.x Create a database connection using .env file // 4. Grab form input and insert into database // 5. Add express-validation package // 6. Validate user input on backend // 7. Validate user input on frontend // 8. Hash our user's password // 9. Store user in database // Login user (update user session, return auth cookie) // 1. Install passport // 2. Configure passport with local strategy // Protect routes and only permit entry with authorization cookie // Create logout button // Create login page Video Timeline: ----------------------------- 02:34 - Understanding the authentication process 05:50 - Setting up our project with a boilerplate template 08:51 - Installing project dependencies with Yarn or NPM 11:17 - Environment files with dotenv 13:32 - Accessing our app's database with MAMP, MySQL, and Sequel Pro 17:46 - Creating our form's markup and adding styling with Bootstrap 4 26:07 - Submitting data to our server and processing our form's post request To be continued... The Platform: ------------------------- http://chriscourses.com is a platform in progress whose goal is to educate aspiring and seasoned web developers via story driven learning. Each course tells a different story, and each milestone reveals a different scene. With an expansive universe to explore, you can track your progress, and gain the necessary skills needed to build your dreams. For updates on the progress of chriscourses.com and future videos, join the Chris Courses mailing list at http://chriscourses.com. Chris Courses Social: ------------------------------------- Twitter: https://twitter.com/chriscourses Facebook: https://www.facebook.com/chriscourses Christopher Lis Social: --------------------------------------- Twitter: https://twitter.com/christopher4lis CodePen: http://codepen.io/christopher4lis
Views: 93880 Chris Courses
What is a Digital Signature?
 
02:02
This channel introduces the "e-Estonia" - a term commonly used to describe Estonia's emergence as one of the most advanced e-societies in the world. You can learn more about Estonian ICT and technology by watching the videos, visiting our homepage http://e-estonia.com or follow us on FB e-Estonia .You can also book a visit and live demo at Estonian ICT Demo Center in Tallinn and establish business contacts with Estonian ICT companies.
Views: 225180 e-estonia
MountainWest RubyConf 2010 - Decent into Darkness: Understanding Your System's Binary Interface...
 
32:48
is the Only Way Out by Joe Damato Help us caption & translate this video! http://amara.org/v/GGvI/
Views: 703 Confreaks
DEF CON 21 - Daniel Selifonov - A Password is Not Enough
 
45:05
A Password is Not Enough: Why disk encryption is broken and how we might fix it DANIEL SELIFONOV Since the publication of the cold boot attack on software disk encryption 5 years ago, there has been little progress on developing countermeasures and implementing defenses in the disk encryption technologies already in wide use. Furthermore, many users of full disk encryption have physical security habits that fall outside the security models of disk encryption software and thus are more vulnerable than they realize. After examining a set of effective, easily executable, attacks on off- the-shelf disk encryption, and contextualizing them in x86 system architecture, we examine recent research on means of mitigating these attacks. By integrating AES new instructions, x86 debugging registers, encrypted RAM, IOMMU, and the TPM into a combined encryption system, the difficulty of executing a successful attack is raised significantly. We will examine the construction of this system in detail, and, at a higher level, the role of full disk encryption in assuring meaningful security in the face of physical access. Source to an experimental version of the system will be made available. Daniel Selifonov has consulted for a handful of research oriented startups since 2007, and built systems for information technology where security was considered throughout design and implementation, rather than as an afterthought. His research interests in security include reverse engineering, applied cryptography, client side security, and user acceptable information system design. He believes that businesses, no matter the size, should have the tools to defend themselves without getting in the way of core operations, and that existing tools and building blocks require too much expert input to implement correctly. Github: https://github.com/thyth/ Personal Website : http://thyth.com/ Materials: https://www.defcon.org/images/defcon-21/dc-21-presentations/Selifonov/DEFCON-21-Selifonov-A-Password-is-Not-Enough-Why-Disk-Encryption-is-Broken.pdf
Views: 1720 DEFCONConference
chapter 5 authentication applications kerberos
 
05:01
Subscribe today and give the gift of knowledge to yourself or a friend chapter 5 authentication applications kerberos Chapter 5 Authentication Applications Kerberos . Kerberos. X.509. How To Secure Network. How do you secure your network and each workstation or server with one tool?. How To Secure Network. Slideshow 2975321 by grover show1 : show2 : show3 : show4 : show5 : show6 : show7 : show8 : show9 : show10 : show11 : show12 : show13 : show14 : show15 : show16 : show17 : show18 : show19 : show20 : show21 : show22 : show23 : show24 : show25 : show26 : show27 : show28 : show29 : show30 : show31 :
Views: 10 Magalyn Melgarejo
Cryptography-101 [06] - HASH (in Bangla/Bengali)
 
45:09
Cryptography-101 [06] - HASH (in Bangla/Bengali) === HASH Hash Functions Cryptographic Hash Function Use of Hash Hash Function Properties Requirements for Hash Function Secure Hash Algorithm (SHA) Comparison of SHA Parameters === Mohammad Mahmud kabir MahmudKabir.com
Views: 135 Mahmud Kabir
Hawk: The Blockchain Model of Cryptography and Privacy-Preserving Smart Contracts
 
17:21
Hawk: The Blockchain Model of Cryptography and Privacy-Preserving Smart Contracts Andrew Miller (University of Maryland) Presented at the 2016 IEEE Symposium on Security & Privacy May 23–25, 2016 San Jose, CA http://www.ieee-security.org/TC/SP2016/ ABSTRACT Emerging smart contract systems over decentralized cryptocurrencies allow mutually distrustful parties to transact safely without trusted third parties. In the event of contractual breaches or aborts, the decentralized blockchain ensures that honest parties obtain commensurate compensation. Existing systems, however, lack transactional privacy. All transactions, including flow of money between pseudonyms and amount transacted, are exposed on the blockchain. We present Hawk, a decentralized smart contract system that does not store financial transactions in the clear on the blockchain, thus retaining transactional privacy from the public's view. A Hawk programmer can write a private smart contract in an intuitive manner without having to implement cryptography, and our compiler automatically generates an efficient cryptographic protocol where contractual parties interact with the blockchain, using cryptographic primitives such as zero-knowledge proofs. To formally define and reason about the security of our protocols, we are the first to formalize the blockchain model of cryptography. The formal modeling is of independent interest. We advocate the community to adopt such a formal model when designing applications atop decentralized blockchains.
Dorothie & Martin Hellman: "Peace, True Love.... and Cryptography" | Talks at Google
 
52:18
Turing Award winner Martin Hellman, along with his wife Dorothie, discuss their book, “A New Map for Relationships: Creating True Love at Home & Peace on the Planet,” and how they went from being madly in love at first, to heading for divorce, then madly in love again--explaining how the same lessons they had to learn in their marriage can help avert worldwide catastrophes such as global warming and nuclear war. Former US Ambassador to Afghanistan Karl Eikenberry has referred to the Hellman’s work as, “the most thoughtful, unique, and fascinating book I have ever read on personal and international diplomacy.” Stories from Marty’s work in cryptography help illustrate ethical dilemmas and the importance of “getting curious, not furious.” “A New Map” can be downloaded for free at: https://anewmap.com/ Dorothie Hellman worked as a CPA at Touche Ross, later becoming a full-time volunteer and VP for Financial Support at the Beyond War Foundation from 1982-87. Since then, she has devoted her life to studying how to improve the human condition. Martin Hellman is best known for his invention, with Diffie and Merkle, of public key cryptography, to enable secure Internet transactions. He currently works on reducing existential risks posed by technology, with an emphasis on nuclear weapons. He is Professor Emeritus of EE at Stanford University, and was awarded the Turing Award in 2015.
Views: 1667 Talks at Google
SSL - Digital Certificate
 
02:56
Website : www.tophostingid.com Email : [email protected] Order SSL : http://www.tophostingid.com/ssl-digital-certificate.php
Views: 140 Top Hosting ID
BOB 2016 - H. Mehnert - Jackline, a secure instant messaging application
 
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Hannes Mehnert Jackline, a secure instant messaging application, functional from the ground up A huge amount of communication is done via instant messaging (IM) these days. An IM protocol which is open and extensible is XMPP, based on XML. A lot of XMPP clients use unsafe languages, and need regular security updates because flaws are found in some of the dependent libraries. The advantage of IM over store-and-forward communication (eMail) is that online end-to-end key exchanges are used (such as authenticated Diffie-Hellman) to provide end-to-end security with forward secrecy. In this talk, I will present Jackline, a terminal-based XMPP client. Jackline is developed full stack in OCaml, running as a MirageOS unikernel on a Xen hypervisor (as well as a native UNIX binary). This unikernel does not include a standard C library, but executes the OCaml runtime directly on Xen. All required protocols, TCP/IP, TLS, XML, XMPP, SASL, and OTR, are implemented in OCaml in a purely functional style. Unicode is supported. The trusted computing base of Jackline is two orders of magnitude smaller than similar systems on UNIX (relying on libxml2, libpurple, OpenSSL, libotr, …). Jackline is still under heavy development, it already has a solid user base. It is a concrete application on top of the cryptographic libraries (TLS and OTR) we developed over the last two years. Jackline provides evidence that OCaml is suitable as a systems programming language: low-level network layers, bit-twiddling symmetric cryptography, complex cryptographic protocols, user interfaces – all in OCaml using functional goodness (purely functional protocols, functional reactive programming). Hannes Mehnert Hannes Mehnert researches in several engineering areas: from programming languages (such as visualisation of compiler optimisations, type systems) over full functional correctness proofs of object-oriented code, development environments for dependently typed languages, to network protocols (TCP/IP) and security protocols (TLS, OTR). He feels safe in a garbage collected environment, and appreciates purely functional goodness. In his spare time, Hannes is not only a hacker, coauthor of a book on Indian cuisine and functional programming in JavaScript, but also a barista and likes to travel with hist recumbent bicycle and repair it. He is currently doing a postdoc at University of Cambridge working with the semantics, systems, and security group. Slides http://bobkonf.de/2016/slides/mehnert.pdf
Views: 346 BOB
202- sftp Web App (Jack Leow)
 
05:09
Java Posse Roundup 2012 Lightning Talk - sftp Web App by Jack Leow. Recorded in Crested Butte, CO on March 28, 2012.
Views: 166 javaposse
DEF CON 23 - Mike Sconzo - I Am Packer And So Can You   Video
 
46:02
Automating packer and compiler/toolchain detection can be tricky and best and downright frustrating at worst. The majority of existing solutions are old, closed source or aren’t cross platform. Originally, a method of packer identification that leveraged some text analysis algorithms was presented. The goal is to create a method to identify compilers and packers based on the structural changes they leave behind in PE files. This iteration builds upon previous work of using assembly mnemonics for packer detection and grouping. New features and analysis are covered for identification and clustering of PE files. Speaker Bio: Mike Sconzo has been around the Security Industry for quite some time, and is interested in creating and implementing new methods of detecting unknown and suspicious network activity as well as different approaches for file/malware analysis. This includes looking for protocol anomalies, patterns of network traffic, and various forms of static and dynamic file analysis. He works on reversing malware, tool creation for analysis, and threat intelligence. Currently a lot of his time is spent doing data exploration and tinkering with statistical analysis and machine learning.
Views: 1447 DEFCONConference
Sources and Sinks - Code Review Basics
 
07:53
A very basic concept of security code audits is the sources/sinks. Everybody develops an intuition for it, but I still wanted to talk about it, because it would have helped me when I started out. -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm.
Views: 23344 LiveOverflow
A5/1 STREAM CIPHER in GSM cellular networks - animation of how it works
 
09:24
This is animation of the principle of A5/1 stream cipher used to provide over-the-air communication privacy in the GSM cellular telephone standard. It is one of seven algorithms which were specified for GSM use. A5/1 is used in Europe and the United States. A5/1 was developed in 1987, initially kept secret, the general design was leaked in 1994 and the algorithms were entirely reverse engineered in 1999 by Marc Briceno from a GSM telephone.
Views: 33341 Jirka Matousek
20. Mobile Phone Security
 
01:22:00
MIT 6.858 Computer Systems Security, Fall 2014 View the complete course: http://ocw.mit.edu/6-858F14 Instructor: Nickolai Zeldovich In this lecture, Professor Zeldovich discusses the Android platform and its security design. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 12358 MIT OpenCourseWare
DEF CON 21 - Michael Perklin - ACL Steganography Permissions to Hide Your Porn
 
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ACL Steganography - Permissions to Hide Your Porn MICHAEL PERKLIN SECURITY RESEARCHER Everyone's heard the claim: Security through obscurity is no security at all. Challenging this claim is the entire field of steganography itself - the art of hiding things in plain sight. Most people know you can hide a text file inside a photograph, or embed a photograph inside an MP3. But how does this work under the hood? What's new in the stego field? This talk will explore how various techniques employed by older steganographic tools work and will discuss a new technique developed by the speaker which embodies both data hiding and data enciphering properties by encoding data inside NTFS volumes. A new tool will be released during this talk that will allow attendees to both encode and decode data with this new scheme. Michael Perklin (@mperklin) is currently employed as a Senior Investigator within the Corporate Investigations department of an Enterprise class telecommunications firm. Throughout his career he has performed digital-forensic examinations on over a thousand devices and has processed petabytes of information for electronic discovery. Michael has spoken at security conferences internationally about a variety of topics including digital forensics, computer security, data hiding, and anti-forensics. Michael holds numerous security-related degrees, diplomas and certifications, is a member of the High Technology Crime Investigations Association, and is an avid information security nut who loves learning about new ways to break things. Materials: https://www.defcon.org/images/defcon-21/dc-21-presentations/Perklin/DEFCON-21-Perklin-ACL-Steganography-Updated.pdf https://www.defcon.org/images/defcon-21/dc-21-presentations/Perklin/Extras.zip
Views: 3884 DEFCONConference
2011 Killian Lecture: Ronald L. Rivest, "The Growth of Cryptography"
 
01:09:19
Lecture title: "The Growth of Cryptography" Ronald L. Rivest, a professor of electrical engineering and computer science who helped develop one of the world's most widely used Internet security systems, was MIT’s James R. Killian, Jr. Faculty Achievement Award winner for 2010–2011. Rivest, the Andrew and Erna Viterbi professor in MIT's Department of Electrical Engineering and Computer Science, is known for his pioneering work in the field of cryptography, computer, and network security. February 8, 2011 Huntington Hall (10-250)
DEF CON 24 - Jmaxxz - Backdooring the Frontdoor
 
38:38
As our homes become smarter and more connected we come up with new ways of reasoning about our privacy and security. Vendors promise security, but provide little technical information to back up their claims. Further complicating the matter, many of these devices are closed systems which can be difficult to assess. This talk will explore the validity of claims made by one smart lock manufacturer about the security of their product. The entire solution will be deconstructed and examined all the way from web services to the lock itself. By exploiting multiple vulnerabilities Jmaxxz will demonstrate not only how to backdoor a front door, but also how to utilize these same techniques to protect your privacy. Bio: Jmaxxz works as a software engineer for a Fortune 100 company, and is a security researcher for pleasure. His FlashHacker program was featured in Lifehacker’s most popular free downloads of 2010. More recently he has contributed to the node_pcap project which allows interfacing with libpcap from node. His other interests include lock picking and taking things apart.
Views: 45476 DEFCONConference
What Is Public Key Cryptography (PKC) Full Explain In Hindi For O level Exam
 
05:13
What Is Public Key Cryptography? What is encryption encryption-kya-hota-hai ╔╦╦╦═╦╗╔═╦═╦══╦═╗☆ ║║║║╩╣╚╣═╣║║║║║╩╣TO My Channel ╚══╩═╩═╩═╩═╩╩╩╩═╝☆ Subscribe my channel like videos comment below any query to Subscribe Us & Comment:- https://goo.gl/FJ1nWJ Follow On social site © original channel ██║▌│║║█║█║▌║║█║▌│ █ __/LINKS\_ ► Facebook:➜ http://facebook.com/techvideoguru ► Twitter:➜ https://mobile.twitter.com/techvideoguru ► Google+:➜ https://plus.google.com/u/0/107344256878607670469 ► Website:➜ http://techvideoguru.mobi ►Youtube:-https://www.youtube.com/techvideoguru ►Blog:-http://techvideoguru.blogspot.in ►Instagram:-https://www.instagram.com/techvideoguru/ ►Pinterest:- https://www.pinterest.com/techvideoguru/ ►Dailymotion:-http://www.dailymotion.com/techvideoguru ►LinkedIn:-https://in.linkedin.com/in/vikas-kumar-maurya-27262b78 ================================================ ╔══════════════════════╗ __|Watch More Videos|_ https://goo.gl/FJ1nWJ ╚══════════════════════╝
Views: 67219 TechVideo Guru
How to Reverse-Engineer a Satellite TV Smart Card
 
04:35
Notorious hacker Chris Tarnovsky opens his underground laboratory to Wired.com, providing a peek into the world of satellite TV smart-card hacking. This complicated process involves nail polish, a pin head and various acids -- so don't try this at home (unless you're Chris Tarnovsky)!
Views: 1087205 WIRED
18. Private Browsing
 
01:20:13
MIT 6.858 Computer Systems Security, Fall 2014 View the complete course: http://ocw.mit.edu/6-858F14 Instructor: James Mickens In this lecture, Professor Mickens discusses privacy in the context of web browsers and web security. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 6725 MIT OpenCourseWare
INTRODUCTION TO FIREWALLS FOR NETWORK SECURITY IN HINDI
 
12:42
find relevant notes at-https://viden.io/
Views: 64123 LearnEveryone
DEF CON 22 - Ladar Levison and Stephen Watt - Dark Mail
 
56:21
Slides Here: https://defcon.org/images/defcon-22/dc-22-presentations/Levison-Watt/DEFCON-22-Levison-Watt-Dark-Mail-UPDATED.pdf Dark Mail Ladar Levison FOUNDER OF LAVABIT, LLC Stephen Watt LEAD DEVELOPER, REFERENCE IMPLEMENTATION, DARK MAIL Data privacy and anonymity have long been cornerstone interests of the computer security world, but not particularly important to the general public. News events in the past year have seen the political climate shift radically, and now data privacy has become big business with secure mail solutions being the focal point of this new found attention. Dark Mail is not the only solution in the secure mail space, but just as Lavabit’s preoccupation with privacy and user autonomy was a rarity when it started over a decade ago, it hopes once again to push mail security forward into a new frontier. It is Dark Mail's objective to achieve the highest degree of security possible - with the introduction of an interoperable mail protocol as an open standard. To that end, we are publishing documents describing the protocol, along with a reference implementations of the client and server under a free software license. What most of the secure email systems in the privacy race have prioritized in tandem are ease of use for the masses, and cryptographically secure encryption of message contents between a sender and recipient. Additionally, they tend to place trust for private key management and encryption in the hands of the end user, and not the mail server. While this would certainly be an improvement over traditional SMTP, it leaves much to be desired. Where do other solutions fall short? Metadata. Dark Mail is designed to minimize the leakage of metadata so that ancillary information like subject lines, recipients, and attachments doesn’t fall into the hands of curious third parties. That means all information about the mail and its contents are completely opaque to everybody but the parties communicating - including the servers handling the messages in transit. Accomplishing these goals wasn’t possible using existing standards, which is why we created a security enhanced flavor of SMTP for mail delivery dubbed DMTP. What separates dmail from competing secure mail designs is the level of security it affords the user while retaining its simplicity of use. We have automated the key management functions, so complex cryptography operations are handled without user interaction. Of equal importance is the need for an implementation that is open to peer review, security audits, and cryptanalysis. Unlike many commercial solutions, dmail isn’t tethered to a single centralized provider; instead it offers the ability for anybody to host secure mail services. Like today, users will be able to access their mail from anywhere, using a web client with client-side encryption, or a traditional client application on their mobile or desktop device for an even greater degree of security. An open standard will guarantee that users have the freedom to adopt any dmail-compatible client or server implementation of their choosing. Most attendees of this presentation will be familiar with the curious story of Lavabit's demise. While Lavabit's hosted mail service refused to surrender unfettered access to its users' secrets, this course of action may not be the obvious choice for network administrators placed in similar situations. Most digital surveillance efforts require the service provider to be complicit with the wiretapping requests of law enforcement. Dmail aims to protect messages from surveillance and tampering - whether it be subversive or coerced - by placing that capability beyond the reach of service providers. With dmail the keys belong to the user, and the message decryption occurs on the user’s device. Even so, users can choose how much to trust a service provider - with standardized modes that reside at different points along the security vs usability spectrum.
Views: 4824 DEFCONConference
Cryptographic Hash Functions (Contd...2)
 
49:06
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 7693 nptelhrd
Firewall limitations - Software and Hardware - Disadvantages| Network Security | TechTerms
 
03:43
Firewall Limitations, Network Security. A firewall can not protect against: malicious insiders; connections that circumvent it; completely new threats; some viruses. The top 10 firewall limitations include: Viruses. There are several limitations of firewalls - both firmware and software. Follow us on Facebook: https://www.facebook.com/DGTechTerms/ Follow us on Twitter: https://twitter.com/Technical_Terms Today, we are going to learn about five limitations of firewall. These days, everyone knows that firewall keeps hackers away. But having a firewall makes us completely secure? No matter how much we try, there are certain limitations that raises questions on the firewall security The First and foremost among the limitations of firewalls is : • how it verifies the incoming data. 2nd limitation is : • Insider’s intrusion Now, the 3rd one • Direct internet traffic 4th limitation is: • Firewall’s trust on ‘Trusted networks’ Last one is: • No protection against Masquerades Finally, Firewalls don't provide any anti-virus or anti-malware properties. This means we need additional protection in our computer if some harmful files has been introduced into your system from trusted channels like emails.
Views: 14444 TechTerms
Coinscrum {Presents} : w/ Edge Secure's Paul Puey - Safeguarding Your Crypto
 
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SAFEGUARDING YOUR CRYPTO Coinscrum {Presents} welcomes Paul Puey, CEO and founder of the leading crypto wallet application, Edge Secure. As crypto-based assets continue to flow into the digital wallets of a growing number of enthusiasts and investors, the long-standing issue of security and key management becomes ever more pressing. Paul is a long standing and high profile innovator in the space and will be here to explain Edge's key features as well as giving HODLers, both new and old, some clear insight into what you need to be doing to ensure your assets are safe yet accessible. ABOUT PAUL Paul is a proud Electrical Engineering and Computer Science graduate of UC Berkeley with a wide range of technical skills from low-level 3D graphics systems engineering to development of custom web CMS systems, back before people knew what a CMS was. He held a lead engineering position with Nvidia and significantly contributed to the design of highly cross platform software architecture enabling code-reuse across multiple ASIC generations and across multiple operating systems. A stickler for proper architecture, he insists on projects being designed from the ground up for maintainability and scalability.
Views: 91 Coinscrum
FTP SFTP with Python Tutorial - p2. Putting files to server
 
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Welcome to my tutorial concerning how to use Python for SFTP / FTP in order to get and put files from and to webservers via Secure File Transfer Protocol. This video teaches you specifically how to put files from your local machine to a remote server using SFTP (secure file transfer protocol). Make sure you install in the following order: PyCrypto, Paramiko, PySFTP. 32-bit: https://ftp.dlitz.net/pub/dlitz/crypto/pycrypto/pycrypto-2.6.1.tar.gz https://pypi.python.org/packages/source/p/paramiko/paramiko-1.12.0.tar.gz 64-bit: PyCrypto: http://www.voidspace.org.uk/downloads/pycrypto26/pycrypto-2.6.win-amd64-py2.7.exe Paramiko: http://dragffy.com/blog/wp-content/uploads/2011/11/paramiko-1.7.7.1.win-amd64_Jaraco_patch.exe Then: https://code.google.com/p/pysftp/downloads/detail?name=pysftp-0.2.2.tar.gz Sentdex.com Facebook.com/sentdex Twitter.com/sentdex
Views: 23394 sentdex
Distributed Apps with IPFS (Juan Benet) - Full Stack Fest 2016
 
51:25
The InterPlanetary File System (IPFS) is a new hypermedia distribution protocol, addressed by content and identities. IPFS enables the creation of completely distributed applications. It aims to make the web faster, safer, and more open. IPFS enables completely decentralized and distributed apps. And it now supports fully dynamic apps, like real-time chat! This talk breaks down how to build a dynamic app on top of IPFS with CRDTs, pub/sub, and slick UIs. It also delves into new models for distributed computation, and the ethical importance of distributing the web. About the speaker: Juan is the inventor of IPFS and Filecoin. He founded Protocol Labs, Inc., he loves open source, and believes improving the internet is critical work. Juan is obsessed with knowledge, science, and technology. He studied at Stanford, and the Web. Talk given at Full Stack Fest 2016
Views: 19941 Codegram Technologies
[Deutsch] #IOTA Sonntagsplausch 28. Oktober '18
 
25:04
Holt euch erstmal einen Kaffee. Einmal die Woche, gibt's von mir den Sonntagsplausch. Halbwissen, meine Meinung, was ist überhaupt passiert? Gibt mir bitte Rückmeldung, wenn euch was nicht passt! Erklärung: ich bin weder Mitglied, noch beauftragt, noch bezahlt von der IOTA Foundation. Meine Dienste sollten nicht als Investitions-Beratung interpretiert werden. Investitionen im Bereich Cryptocurrency sind sehr risikoreich! ---Don't copy my Sonntagsplausch / Sunday Banter without my consent--- Viel Durchhaltevermögen. Patreon: https://www.patreon.com/join/limo_tangleblog Support Tangleblog.com: https://www.tangleblog.com/support-tangleblog-com/ Interesting things from the ecosystem https://blog.iota.org/iota-and-freedom-bfc76770cd77 https://twitter.com/iotatoken/status/1055230952656592896 https://iotahispano.com/2018/10/24/nothing-to-prove-terry-shane-biotasphere-founder-talks-to-iota-hispano-about-the-insure-my-car-poc/ https://www.carvertical.com/ https://twitter.com/server24/status/1055909753728233472 https://github.com/PACTCare/Pact.online/blob/master/Pact%20Security%20Whitepaper_V0.1.pdf https://data.iota.org/#/ https://www.iota.org/the-foundation/team https://medium.com/coinmonks/reusable-addresses-with-iota-pay-38c4b3f10333 https://projects.eclipse.org/proposals/eclipse-iota-trinity https://iotalink.directory/ Meetups, conferences, videos http://www.fujitsu.com/global/microsite/forum-2018/index.html http://www.fujitsu.com/global/microsite/forum-2018/expert-talks/index.html https://twitter.com/EDAG/status/1054316682775281664 https://www.bayern-innovativ.de/cluster-automotive/veranstaltung/iota2018 Speculation https://coinmarketcap.com/ https://cryptowat.ch/markets/bitfinex/btc/usd/3d https://cryptowat.ch/markets/bitfinex/iot/usd/3d
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