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Cryptographic Hash Functions
 
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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: 12055 nptelhrd
21. Cryptography: Hash Functions
 
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MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas covers the basics of cryptography, including desirable properties of cryptographic functions, and their applications to security. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 62154 MIT OpenCourseWare
Hashing: Why & How?
 
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Why do we wish to reduce a long list to a short one? How to do it, so that the short list will identify the long list. How to do it so that it is impossible to identify the long list from the short one, and the implications of the fact that many long lists share the very same short list. Hashing configurations: straight encryption, MD4, MD5, SHA-1, SHA-2.
Views: 140153 Gideon Samid
6.875 (Cryptography) L17: Hash Functions, Random Oracles
 
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6.875 (Cryptography & Cryptanalysis), Spring 2018 Vinod Vaikuntanathan
Views: 45 Andrew Xia
Cryptographic Hash Function Solution - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 1441 Udacity
DEFCON 19: Cryptographic Oracles
 
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Views: 1524 HackersSecurity
What is RANDOM ORACLE? What does RANDOM ORACLE mean? RANDOM ORACLE meaning & explanation
 
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What is RANDOM ORACLE? What does RANDOM ORACLE mean? RANDOM ORACLE meaning - RANDOM ORACLE definition - RANDOM ORACLE explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In cryptography, a random oracle is an oracle (a theoretical black box) that responds to every unique query with a (truly) random response chosen uniformly from its output domain. If a query is repeated it responds the same way every time that query is submitted. Stated differently, a random oracle is a mathematical function chosen uniformly at random, that is, a function mapping each possible query to a (fixed) random response from its output domain. Random oracles as a mathematical abstraction were firstly used in rigorous cryptographic proofs in the 1993 publication by Mihir Bellare and Phillip Rogaway (1993). They are typically used when the cryptographic hash functions in the method cannot be proven to possess the mathematical properties required by the proof. A system that is proven secure when every hash function is replaced by a random oracle is described as being secure in the random oracle model, as opposed to secure in the standard model of cryptography. Random oracles are typically used as an ideal replacement for cryptographic hash functions in schemes where strong randomness assumptions are needed of the hash function's output. Such a proof generally shows that a system or a protocol is secure by showing that an attacker must require impossible behavior from the oracle, or solve some mathematical problem believed hard in order to break it. Not all uses of cryptographic hash functions require random oracles: schemes that require only one or more properties having a definition in the standard model (such as collision resistance, preimage resistance, second preimage resistance, etc.) can often be proven secure in the standard model (e.g., the Cramer–Shoup cryptosystem). Random oracles have long been considered in computational complexity theory, and many schemes have been proven secure in the random oracle model, for example Optimal Asymmetric Encryption Padding, RSA-FDH and Probabilistic Signature Scheme. In 1986, Amos Fiat and Adi Shamir showed a major application of random oracles – the removal of interaction from protocols for the creation of signatures. In 1989, Russell Impagliazzo and Steven Rudich showed the limitation of random oracles – namely that their existence alone is not sufficient for secret-key exchange. In 1993, Mihir Bellare and Phillip Rogaway were the first to advocate their use in cryptographic constructions. In their definition, the random oracle produces a bit-string of infinite length which can be truncated to the length desired. According to the Church–Turing thesis, no function computable by a finite algorithm can implement a true random oracle (which by definition requires an infinite description). In fact, certain artificial signature and encryption schemes are known which are proven secure in the random oracle model, but which are trivially insecure when any real function is substituted for the random oracle. Nonetheless, for any more natural protocol a proof of security in the random oracle model gives very strong evidence of the practical security of the protocol. In general, if a protocol is proven secure, attacks to that protocol must either be outside what was proven, or break one of the assumptions in the proof; for instance if the proof relies on the hardness of integer factorization, to break this assumption one must discover a fast integer factorization algorithm. Instead, to break the random oracle assumption, one must discover some unknown and undesirable property of the actual hash function; for good hash functions where such properties are believed unlikely, the considered protocol can be considered secure.
Views: 130 The Audiopedia
How to Build Transparent Data Encryption on Oracle Standard Edition
 
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View all our FREE database tutorials at http://skillbuilders.com/free-oracle-tutorials. Oracle Transparent Data Encryption (TDE) is a fantastic built-in security feature with Oracle Database Enterprise Edition. However, in this free tutorial, Oracle Master DBA John Watson will demonstrate a technique for building your own transparent data encryption - on Standard Edition!
Views: 4518 SkillBuilders
message authentication code tutorial
 
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In cryptography, a message authentication code (MAC), sometimes known as a tag, is a short piece of information used to authenticate a message—in other words, to confirm that the message came from the stated sender (its authenticity) and has not been changed. The MAC value protects both a message's data integrity as well as its authenticity, by allowing verifies (who also possess the secret key) to detect any changes to the message content.
Views: 16542 NadjibSoft
Random Oracle Reducibility (Crypto 2011)
 
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Paul Baecher and Marc Fischlin Darmstadt University of Technology, Germany Abstract. We discuss a reduction notion relating the random oracles in two cryptographic schemes A and B. Basically, the random oracle of scheme B reduces to the one of scheme A if any hash function instantiation of the random oracle (possibly still oracle based) which makes A secure also makes B secure. In a sense, instantiating the random oracle in scheme B is thus not more demanding than the one for scheme A. If, in addition, the standard cryptographic assumptions for scheme B are implied by the ones for scheme A, we can conclude that scheme B actually relies on weaker assumptions. Technically, such a conclusion cannot be made given only individual proofs in the random oracle model for each scheme. The notion of random oracle reducibility immediately allows to transfer an uninstantiability result from an uninstantiable scheme B to a scheme A to which the random oracle reduces. We are nonetheless mainly interested in the other direction as a mean to establish hierarchically ordered random-oracle based schemes in terms of security assumptions. As a positive example, we consider the twin Diffie-Hellman (DH) encryption scheme of Cash et al.~(Journal of Cryptology, 2009), which has been shown to be secure under the DH assumption in the random oracle scheme. It thus appears to improve over the related hashed ElGamal encryption scheme which relies on the random oracle model and the strong DH assumption where the adversary also gets access to a decisional DH oracle. As explained above, we complement this believe by showing that the random oracle in the twin DH scheme actually reduces to the one of the hashed ElGamal encryption scheme. We finally discuss further random oracle reductions between common signature schemes like GQ, PSS, and FDH.
Views: 1194 TheIACR
Padding - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 3246 Udacity
Cryptographic Reverse Firewall via Malleable Smooth Projective Hash Functions
 
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Rongmao Chen and Yi Mu and Guomin Yang and Willy Susilo and Fuchun Guo and Mingwu Zhang. Talk at Asiacrypt 2016. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=27898
Views: 149 TheIACR
Strong Collision Resistance - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 5178 Udacity
How to use Oracle SHA 256 Bit & 512 Bit Data Encryption Algorithms?
 
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Function And Java Class You Can get from Below Link... https://github.com/arulxaviers/Oracle_PLSQL_SHA_256_512_Encryption A Complete Brief Video about How to use Oracle Database Encryption By Using SHA 256 Bit & 512 Bit Algorithms? How to use Oracle SHA 256 Bit & 512 Bit Data Encryption Algorithms? Oracle Data Encryption Database Encryption dbms_crypto.hash example 11g dbms_crypto.hash sha256 dbms_crypto.hash invalid identifier dbms_crypto.hash 12c dbms_crypto.encrypt example encryption and decryption in oracle 11g sys.dbms_crypto.hash example SHA 256 Bit SHA 512 Bit Encryption
Views: 791 Oracle PL/SQL World
Hash Values
 
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This video is about Hash Values
Views: 2466 Nick Marriott
Cryptographic Hash Functions (Contd...1)
 
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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: 7454 nptelhrd
Random Oracle - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 2844 Udacity
cryptography - CBC MAC
 
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Cryptography To get certificate subscribe: https://www.coursera.org/learn/cryptography ======================== Playlist URL: https://www.youtube.com/playlist?list=PL2jykFOD1AWb07OLBdFI2QIHvPo3aTTeu ============================ Youtube channel: https://www.youtube.com/user/intrigano ============================ https://scsa.ge/en/online-courses/ https://www.facebook.com/cyberassociation/
Views: 1815 intrigano
003 Hash Func and Oracle Method
 
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Hash Func and Oracle Method Remember to Subscribe and comment! if you got any issues or questions just say it Follow us on Instagram: https://www.instagram.com/hackers_club.dedhak/ Follow us on twitter: https://twitter.com/TheDedHak Follow us on : https://dedhak.blogspot.in/ Like my page: https://www.facebook.com/ComputerTricksTricks
Views: 8 DedHak
All Things Oracle Database Encryption
 
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Encrypting data is a useful tool to protect sensitive data be it at rest, in motion, or in use. For an Oracle Database, encryption may be done at the storage, application, network, and backup layers. Therefore, implementing database encryption can be time consuming and difficult as there are performance considerations and challenges such as effective key management for each encryption solution. This education webinar examines available Oracle Database encryption technologies and deployment options highlighting the benefits and potential pitfalls of each encryption solution.
Views: 6160 Integrigy
Proofs in Cryptography: Lecture 11 Random Oracle Model ROM
 
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Proofs in Cryptography Lecture 11 Random Oracle Model ROM ALPTEKİN KÜPÇÜ Assistant Professor of Computer Science and Engineering Koç University http://crypto.ku.edu.tr
Views: 2462 KOLT KU
Pigeonhole Principle and Hash Functions (Statistics Examples 5)
 
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Applying the pigeonhole principle to (cryptographic) hash functions to determine how many inputs collide on a single hash value.
Views: 1051 Steven Gordon
Cryptographic Hash Functions (Part 1): Overview [Crypto Hash]
 
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📌FREE Signals for Crypto Trading Every Day! 🚀100% Profit ➡ https://t.me/CryptoTopX + 🔥Hurry to Sign Up Crypto Exchange (💲Only 1000 users/day)+Bonus ➡ https://goo.gl/cy6fmV ................................................................................................................Cryptography (Software Genre) Cryptographic Hash Functions Secure Hashing Algorithm cyber defense and attacks University of Nottingham sunny sun sunnysunkansas cryptographic function Hash Function information security hash function coin how do hashes work random oracle model Bitcoin data authentication the crypto academy hash Bitcoin (Currency) one way function Crypto Hash LTD Hashing network security computer science one-way function sunny classroom getting started confidentiality functions access control data signature data integrity basic tutorial best practices authentication sunnyclassroom computerphile с чего начать Dr Mike Pound authorization cybersecurity cryptography merkle tree cryptographic fundamentals introduction passwords networking+ Crytography forty plus сорок плюс encryption networking explainer chainthat tom scott sunny sun blockchain encrypted integrity security+ faucethub hashflare computers mining bitcoin SHA security kanthety Dogecoin computer training beginner tutorial crypto SHA-2 40 plus 40 плюс bitcoin crypto hash storage saradhi майнинг science sha-256
Views: 0 Trading Crypto
ThinkQuest Winners Hash That Talks About Cryptography
 
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ThinkQuest (http://tinyurl.com/4vla8f) is an international competition sponsored by Oracle Education Foundation that challenges teams of students to create innovative and educational Web sites to share with the world. Hear Hash That, the 2nd place winner in the Under-19 category, discuss their winning entry on cryptography titled 'Can you keep that a secret?' http://tinyurl.com/475eha
Views: 598 jeanettetan2008
Random Oracle Solution - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 1253 Udacity
Watch 21. Cryptography: Hash Functions - Crypto Hash
 
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📌FREE Signals for Crypto Trading Every Day! 🚀100% Profit ➡ https://t.me/CryptoTopX + 🔥Hurry to Sign Up Crypto Exchange (💲Only 1000 users/day)+Bonus ➡ https://goo.gl/cy6fmV ................................................................................................................Cryptography (Software Genre) Cryptographic Hash Functions Secure Hashing Algorithm cyber defense and attacks University of Nottingham sunny sun sunnysunkansas cryptographic function Hash Function information security hash function coin how do hashes work random oracle model Bitcoin data authentication the crypto academy hash Bitcoin (Currency) one way function Crypto Hash LTD Hashing network security computer science one-way function sunny classroom getting started confidentiality functions access control data signature data integrity basic tutorial best practices authentication sunnyclassroom computerphile с чего начать Dr Mike Pound authorization cybersecurity cryptography merkle tree cryptographic fundamentals introduction passwords networking+ Crytography forty plus сорок плюс encryption networking explainer chainthat tom scott sunny sun blockchain encrypted integrity security+ faucethub hashflare computers mining bitcoin SHA security kanthety Dogecoin computer training beginner tutorial crypto SHA-2 40 plus 40 плюс bitcoin crypto hash storage saradhi майнинг science sha-256
Views: 0 Trading Crypto
What is a HashTable Data Structure - Introduction to Hash Tables , Part 0
 
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This tutorial is an introduction to hash tables. A hash table is a data structure that is used to implement an associative array. This video explains some of the basic concepts regarding hash tables, and also discusses one method (chaining) that can be used to avoid collisions. Wan't to learn C++? I highly recommend this book http://amzn.to/1PftaSt Donate http://bit.ly/17vCDFx
Views: 702433 Paul Programming
Cracking a Password Hash with John (JTR)
 
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Here I show you how to crack a number of MD5 password hashes using John the Ripper (JTR), John is a great brute force and dictionary attack tool that should be the first port of call when password cracking.
Views: 57965 Latest Hacking News
Playing with Hashing 01: Intro to Hash Functions
 
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Hash functions are a fun cryptographic concept which map arbitrarily long data into a fixed-length space. In most cases, they are collision-resistant and non-reversible. In this video, I talk about hash functions, their definition, and give examples of hash function output using Python. I also demo a small program which compares hash vs byte comparison for files. Wikipedia Article on Hash Functions: https://en.wikipedia.org/wiki/Hash_function An excellent (advanced) writeup on Hash Functions: https://cseweb.ucsd.edu/~mihir/cse207/w-hash.pdf The sample program I created: https://gist.github.com/brandonio21/30fe3c81a6e763c9aaba047e70a78ebf
Network security by Hash function
 
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Network Security by depatment of computer science
Views: 784 skywalk309
Cipher Block Chaining Mode - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 53645 Udacity
Watch 21. Cryptography: Hash Functions - Crypto Md5
 
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📌FREE Signals for Crypto Trading Every Day! 🚀100% Profit ➡ https://t.me/CryptoTopX + 🔥Hurry to Sign Up Crypto Exchange (💲Only 1000 users/day)+Bonus ➡ https://goo.gl/cy6fmV ................................................................................................................how to encrypt and decrypt a string in c# Basic algorithms and encryption concepts php md5 password encryption and db entry Password Encryption and Decryption in PHP php register script with md5 encryption Cryptography Algorithms and Protocols NodeJS Create MD5 Hash Example NodeJS Create MD5 Hash Video Crypto Cryptography (Software Genre) NodeJs Symmetric Encryption asp.net blog sitesi yapımı NodeJS Create MD5 Hash key scheduling algorithm Cryptography Hash Function asp.net mvc blog sitesi cryptographic function sha 1 algorithm steps hash length extension asp.net mvc pagedlist asp.net mvc bootstrap software exploitation random oracle model asp.net mvc hosting hacking tutorials file integrity lastmomenttuitions lastmomenttuition asp.net mvc blog Birthday Paradox Web developement NodeJS Tutorial Encryption banco de dados cyber security NodeJS Example let's hack sha 1 working fiestal round Tutorial computerphile cybersecurity hash function hash cryptography criptografia sha1 vs md5 how to hack integrity Symmetric хеш функция live hacking asp.net mvc хеширование programação
Bitcoin - Cryptographic Hash Function [Crypto Hash]
 
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📌FREE Signals for Crypto Trading Every Day! 🚀100% Profit ➡ https://t.me/CryptoTopX + 🔥Hurry to Sign Up Crypto Exchange (💲Only 1000 users/day)+Bonus ➡ https://goo.gl/cy6fmV ................................................................................................................Cryptography (Software Genre) Cryptographic Hash Functions Secure Hashing Algorithm cyber defense and attacks University of Nottingham sunny sun sunnysunkansas cryptographic function Hash Function information security hash function coin how do hashes work random oracle model Bitcoin data authentication the crypto academy hash Bitcoin (Currency) one way function Crypto Hash LTD Hashing network security computer science one-way function sunny classroom getting started confidentiality functions access control data signature data integrity basic tutorial best practices authentication sunnyclassroom computerphile с чего начать Dr Mike Pound authorization cybersecurity cryptography merkle tree cryptographic fundamentals introduction passwords networking+ Crytography forty plus сорок плюс encryption networking explainer chainthat tom scott sunny sun blockchain encrypted integrity security+ faucethub hashflare computers mining bitcoin SHA security kanthety Dogecoin computer training beginner tutorial crypto SHA-2 40 plus 40 плюс bitcoin crypto hash storage saradhi майнинг science sha-256
Views: 0 Trading Crypto
Quantum Position Verification in the Random Oracle Model
 
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Quantum Position Verification in the Random Oracle Model by Dominique Unruh. Talk at Crypto 2014.
Views: 224 TheIACR
Episode 90: Database Encryption
 
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John Kristoff talks about database encryption: how data gets stolen and the implications and methods of encrypting various types of data, including the use of random salt values and hash functions.
Views: 3060 Team Cymru
Kerberos - authentication protocol
 
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At 4:30: A mistake: step 3: When the file server gets the token, it "decrypts" (not "encrypts") the token with the secret key shared with TGS. In Greek mythology, Kerberos is a dog with three heads. But today I will not talk about the dog. Kerberos is an authentication protocol for client/server applications. I will demonstrate with an example how Kerberos works. Keep in mind, Kerberos implements private key encryption. Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Advanced Cryptography: https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Please leave comments, questions and Please subscribe to my channel Many thanks, Sunny Classroom
Views: 40816 Sunny Classroom
14.412 Simple Hash Join
 
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My book "Patterns in Data Management" is now available both as an ebook or a print book (with color graphics!). See: http://amzn.to/1Ts3rwx This book is not a standard textbook on database techniques. This book was written extending and complementing preexisting educational videos (including this one). Video for my inverted classroom "Database Systems". The complete list of videos, slides, and additional material is (will be) available at http://datenbankenlernen.de Computer Science, Saarland University: Bachelor (in German): http://www.cs.uni-saarland.de/index.p... Master (in English): http://www.cs.uni-saarland.de/index.p... Ph.D./Grad School: http://gradschool.cs.uni-saarland.de/
How to use Ophcrack and Rainbow Tables to crack a password hash
 
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A quick tutorial on using the Ophcrack program and downloadable rainbow tables to reveal a hashed Windows password. http://danscourses.com
Views: 62811 danscourses
Padding Solution - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 1399 Udacity
Transparent Data Encryption in SQL Server 2012 - Demonstration
 
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You can take several precautions to help secure the database such as designing a secure system, encrypting confidential assets, and building a firewall around the database servers. However, in a scenario where the physical media (such as drives or backup tapes) are stolen, a malicious party can just restore or attach the database and browse the data. One solution is to encrypt the sensitive data in the database and protect the keys that are used to encrypt the data with a certificate. This prevents anyone without the keys from using the data, but this kind of protection must be planned in advance. Transparent data encryption (TDE) performs real-time I/O encryption and decryption of the data and log files. The encryption uses a database encryption key (DEK), which is stored in the database boot record for availability during recovery. The DEK is a symmetric key secured by using a certificate stored in the master database of the server or an asymmetric key protected by an EKM module. TDE protects data "at rest", meaning the data and log files. It provides the ability to comply with many laws, regulations, and guidelines established in various industries. This enables software developers to encrypt data by using AES and 3DES encryption algorithms without changing existing applications. http://msdn.microsoft.com/en-us/library/bb934049.aspx
Views: 30420 Jasmin Azemović
Applying Java’s Cryptography
 
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Learn how to control Java’s cryptographic features to protect your application and any data that you manage. This session explains what different cryptography features do, what threats are addressed by each feature, and where the configuration takes place. Topics include certificates, code signatures, authenticating dynamic JVM languages, TLS control, perfect forward security, and transparent JPA encryption. Author: Erik Costlow Erik Costlow is a product manager in Oracle's Java Platform Group and a regular contributor to the Java Platform Group PM blog. Erik also works closely with industry on Oracle's Java Root Certificate Program to ensure highest program quality. Previously Erik was employed at HP where he influenced design of the Fortify security analysis suite used by software developers across the world. View more trainings by Erik Costlow at https://www.parleys.com/author/erik-costlow Find more related tutorials at https://www.parleys.com/category/developer-training-tutorials
Views: 9916 Oracle Developers
The Tiger & a Whirlpool-Attack
 
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Abstract. In this paper, we develop a new attack on Damg°ard-Merkle hash functions, called the herding attack, in which an attacker who can find many collisions on the hash function by brute force can first provide the hash of a message, and later herd any given starting part of a message to that hash value by the choice of an appropriate suffix. We focus on a property which hash functions should haveChosen Target Forced Prefix (CTFP) preimage resistanceand show the distinction between Damg°ard-Merkle construction hashes and random oracles with respect to this property. We describe a number of ways that violation of this property can be used in arguably practical attacks on real-world applications of hash functions. An important lesson from these results is that hash functions susceptible to collision-finding attacks, especially brute-force collision-finding attacks, cannot in general be used to prove knowledge of a secret value. Introduction Cryptographic hash functions are usually assumed to have three properties: Collision resistance, preimage resistance, and second preimage resistance. And yet many additional properties, related to the above in unclear ways, are also required of hash function in practical applications. For example, hash functions are sometimes used in commitment schemes, to prove prior knowledge of some information, priority on an invention, etc. When the information takes on more than a small number of possible values, there does not appear to be an obvious way to extend a collision finding attack to break the commitment scheme; therefore, collision resistance does not seem to be necessary to use the hash function in this way. This appears fortunate in light of the many recent attacks on collision resistance of existing hash functions[2, 3, 13, 19, 2124] and the widespread use of hash functions short enough to fall to brute-force collision attacks 20. We show that the natural intuition above is incorrect. Namely, we uncover (what we believe to be) subtle ways of exploiting the iterative property of Damg°ard-Merkle[6, 16] hash functions to extend certain classes of collision-finding attacks against the compression function to attack commitment schemes and other uses of hash function that do not initially appear to be related to collision resistance. http://www.cs.washington.edu/homes/yoshi/papers/EC06/herding.pdf http://video.google.com/videoplay?docid=-6086749167583048867 http://downloads.bistum-augsburg.de/108313636519180.pdf
Views: 894 vitrohype
MD5 Hash Tutorial - What the MD5 hash means and how to use it to verify file integrity.
 
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Please like / share / subscribe if you like my MD5 hash tutorial! Here I explain how you use the MD5 hash of a file to verify its integrity in a simple MD5 hash tutorial. We use a windows based utility, md5sum.exe (http://www.etree.org/md5com.html) to check the integrity of a picture before and after we make an almost imperceptible change. Of course, we need not have used a picture, we could use any digital file to demonstrate the power of the MD5 hash for file integrity checking. As you will see in the video, using MD5 hashing, you can guarantee / verify the integrity of a Word document, a picture, a sound or video file or a software application. Reasons an integrity check might fail could be through file corruption on disk, communications corruption while downloading or even unauthorised tampering. I hope you enjoy the video, more coming soon. Music Credits : Music by Approaching Nirvana http://youtube.com/user/approachingnirvana Song: Death Of A King Buy the song on iTunes: http://bit.ly/SjRQBy
Views: 126224 Sean Browne
Provide Scarcity - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 797 Udacity
Hash Length Extension Attacks - CamSec - Computer Security
 
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CamSec is a monthly meetup at the Centre for Computing History in Cambridge, UK. A get together to share ideas, knowledge and war stories from within the IT Security industry with the overall aim of creating a local group for like minded individuals to meet on a regular monthly basis.
Views: 908 CamSec
Proofs in Cryptography: Lecture 7 Reduction Proof Example - PRF Family
 
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Proofs in Cryptography Lecture 7 Reduction Proof Example - PRF Family ALPTEKİN KÜPÇÜ Assistant Professor of Computer Science and Engineering Koç University http://crypto.ku.edu.tr
Views: 2104 KOLT KU
To Hash or Not to Hash Again? (In)Differentiability Resu ...
 
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Talk at crypto 2012. Authors: Yevgeniy Dodis, Thomas Ristenpart, John P. Steinberger, Stefano Tessaro. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=24297
Views: 266 TheIACR