Home
Search results “Cryptographic hash function c”
Hash Tables and Hash Functions
 
13:54
This video describes the fundamental principles of the hash table data structure which allows for very fast insertion and retrieval of data. It covers commonly used hash algorithms for numeric and alphanumeric keys and summarises the objectives of a good hash function. Collision resolution is described, including open addressing techniques such as linear and quadratic probing, and closed addressing techniques such as chaining with a linked list.
Views: 337655 Computer Science
C/C++ Cryptography — Simple Hashing Algorithm | Simple Hash Function
 
01:55
• Support me on Patreon: http://www.patreon.com/Zer0Mem0ry • Donate Bitcoin: 1JhSKGgRQmir8rRF4Sm5CP4fDDofKFAypd • Facebook: https://www.facebook.com/Zer0Mem0ry • Twitter: https://www.twitter.com/Zer0Mem0ry
Views: 10675 Zer0Mem0ry
Passwords & hash functions (Simply Explained)
 
07:28
How can companies store passwords safely and keep them away from hackers? Well let's find out! With all the data breaches lately, it's likely that the password of one of your accounts has been compromised. Hackers now might know the password you've used, but they also might not.. To understand why, we'll take a look at what methods a company can use to protect user passwords. We'll take a look at encryption, hash functions and a multilayer approach! 📚 Sources Can be found on my website: https://savjee.be/videos/simply-explained/hash-functions/ 🌍 Social Twitter: https://twitter.com/savjee Facebook: https://www.facebook.com/savjee ✏️ Check out my blog https://www.savjee.be
21. Cryptography: Hash Functions
 
01:22:01
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: 78732 MIT OpenCourseWare
Hashing | Set 1 (Introduction) | GeeksforGeeks
 
06:55
Explanation for the article: http://quiz.geeksforgeeks.org/hashing-set-1-introduction/ This video is contributed by Illuminati.
Views: 187622 GeeksforGeeks
Hashes 4  Hash Functions for Strings
 
11:16
Dr. Rob Edwards from San Diego State University demonstrates a common method of creating an integer for a string, and some of the problems you can get into.
Views: 15992 RobEdwardsSDSU
Hash Functions
 
08:05
0:00-4:15 - A conceptual overview of hash functions and their requirements. 4:15-end - Hash functions in digital signatures use. For review on how RSA signatures work, see: https://www.youtube.com/watch?v=DIfOvWymmP0 Questions? Feel free to post them in the comments and I'll do my best to answer!
Views: 20017 Theoretically
SHA: Secure Hashing Algorithm - Computerphile
 
10:21
Secure Hashing Algorithm (SHA1) explained. Dr Mike Pound explains how files are used to generate seemingly random hash strings. EXTRA BITS: https://youtu.be/f8ZP_1K2Y-U Tom Scott on Hash Algorithms: https://youtu.be/b4b8ktEV4Bg http://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: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 523175 Computerphile
Topic 06 C Hash Functions
 
12:32
Topic 06 C: Examples of Hash Functions and Universal Hashing Lecture by Dan Suthers for University of Hawaii Information and Computer Sciences course 311 on Algorithms. (Inverted course: lectures are online and problem solving in class.) Based on Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest and Clifford Stein, Introduction to Algorithms, Third Edition, The MIT Press, 2009.
Views: 18118 UHMICSAlgorithms
NETWORK SECURITY - TYPES OF AUTHENTICATION (Message Encryption, MAC, Hash Functions)
 
40:57
Three types of Authentications 1. Message Encryption 2. Message Authentication Code 3. Hash Functions.
Playing with Hashing 01: Intro to Hash Functions
 
15:49
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
Applied Cryptography: Hash Functions - Part 2
 
17:59
This video describes the input-output behavior of hash functions, as well as the security requirements. In particular, one-wayness, first and second pre-image resistance are discussed.
Views: 3873 Leandro Junes
Bitcoin - Cryptographic hash function
 
10:14
What cryptographic hash functions are and what properties are desired of them. More free lessons at: http://www.khanacademy.org/video?v=0WiTaBI82Mc Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief Scientist at Sourcefire. He received his Ph.D. in computer science from MIT.
Views: 224418 Khan Academy
Hashing Techniques Hash Function, Types of Hashing Techniques in Hindi and English
 
15:57
Hashing Techniques Hash Function, Types of Hashing Techniques in Hindi and English * Direct Hashing * Modulo-Division Hashing * Mid-Square Hashing * Folding Hashing - Fold-Shift Hashing and Fold Boundary Hashing * PseudoRandom Hashing * Subtraction Hashing For Students of B.Tech, B.E, MCA, BCA, B.Sc., M.Sc., Courses - As Per IP University Syllabus and Other Engineering Courses
Views: 284772 Easy Engineering Classes
Password Hashing, Salts, Peppers | Explained!
 
04:30
---------------------------------------------------------------------------------------------- Check out my site: http://www.seytonic.com Follow me on twitter: https://twitter.com/seytonic
Views: 74323 Seytonic
Cryptography: Hashing Methods
 
29:57
https://asecuritysite.com/csn11117/unit02
Views: 876 Bill Buchanan OBE
Hashing Algorithms and Security - Computerphile
 
08:12
Audible free book: http://www.audible.com/computerphile Hashing Algorithms are used to ensure file authenticity, but how secure are they and why do they keep changing? Tom Scott hashes it out. More from Tom Scott: http://www.youtube.com/user/enyay and https://twitter.com/tomscott http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Pigeon Sound Effects courtesy of http://www.freesfx.co.uk/ Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 808417 Computerphile
How Does SHA256 Work?
 
04:53
Since SHA1 has been broken, SHA256 is seen as one of the contenders to replace it. In this video I review why it might be needed and how it functions on a low and high level perspective by stepping through the algorithm with an example by converting abc to its digest. I did a similar explanation for SHA1 in another video so check that out. Ill also be doing some supplementary videos on the binary math...ill be having some fun with them :D Music Title Olympus by Ross Bugden https://www.youtube.com/watch?v=BnmglWHoVrk https://creativecommons.org/licenses/by/4.0/ Clips used One Piece film z - Eiichiro Oda, Tatsuya Nagamine Avatar the last Air Bender - Joaquim Dos Santos,Michael Dante DiMartino,Bryan Konietzko Ghost Pain - Masahiko Murata, Kazuchika Kise Terminator Genysis - Alan Taylor,Bill Carraro,Megan Ellison Phantasy Star Online - Keiichirô Kawaguchi,Kyohei Ito One Piece - Kōnosuke Uda, Eiichiro Oda,Alfred Kahn,Toei Animation,Yoshihiro Suzuki Animatrix- Peter Chung, Andrew R. Jones,Mahiro Maeda,Joel Silver The Matrix Reloaded - Lana Wachowski (as The Wachowski Brothers), Lilly Wachowski (as The Wachowski Brothers),Bruce Berman Bleach - Tite Kubo, TV Tokyo, Dentsu and Studio Pierrot Boruto: Naruto Next Generations - Noriyuki Abe and Hiroyuki Yamashita Samurai Champloo - Shinichirō Watanabe,Takatoshi Hamano,Takashi Kochiyama,Tetsuro Satomi
Views: 41782 EpicFactFind
What is a HashTable Data Structure - Introduction to Hash Tables , Part 0
 
07:37
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 STILL NEED MORE HELP? Connect one-on-one with a Programming Tutor. Click the link below: https://trk.justanswer.com/aff_c?offer_id=2&aff_id=8012&url_id=238 :)
Views: 833862 Paul Programming
Cryptographic Hash Functions: Part 1
 
15:24
Cryptographic Hash Functions Applications of Crypto Hash Functions Birthday Problem Secure Hash Algorithm (SHA)
Views: 8999 Scholartica Channel
George Levy - What is a SHA-256 Cryptographic Hash Algorithm?
 
04:30
https://GeorgeLevy.com/Free presents: In this video, I answer a question from one of the viewers of my YouTube channel YouTube.com/GeorgeLevy : What is a SHA-256 Cryptographic Hash Algorithm? Learn more about blockchain, and Bitcoin on my online video course Blockchain and Bitcoin Fundamentals at: http://BlockchainandBitcoinFundamentals.com Sign up to receive FREE video lessons from George Levy's paid blockchain, Bitcoin and cryptocurrency courses at: https://GeorgeLevy.com/Free Subscribe to this channel to stay up to date on new educational videos published each Thursday! Follow George Levy at the following links: https://GeorgeLevy.com (George Levy Website) https://Twitter.com/GeorgeLevy https://Facebook.com/GeorgeLevyBlockchain (Official Facebook Page)
Views: 15488 George Levy
SHA-1 (Secure hash Algorithm) working in English  | CSS series
 
22:42
Take the full crash course of Cryptography and Security System for free at Last moment tuitions Full course : https://lastmomenttuitions.com/course/cryptography-and-system-security/ Sample Notes :https://goo.gl/QpZPF5 For full hand made notes of Artificial Intelligence its only 100 rs payment options is PAYTM :9762903078 once we get payment notification we will mail you the notes on your email id contact us at :[email protected] whatsapp :9762903078 apko koi bhi doubt ho toh app humko direct email ya phone kar sakte ho Cryptography and security systems Series introduction to CSS: https://goo.gl/tjrh1L security goals and mechanism:https://goo.gl/uq35hP symmetric cipher:https://goo.gl/KFxF9j Substitution cipher and its types:https://goo.gl/MKmPzk Transposition cipher:https://goo.gl/uHqD7i diffie -hellman: https://goo.gl/YrskC5 RSA Algorithm:https://goo.gl/KwzCBF Kerberos:https://goo.gl/MQPgzw IDEA algorithm : https://goo.gl/PTCqFH Dos and DDos attack: https://goo.gl/8T345G SQL injection:https://goo.gl/bcVHnw SHA-1 vs MD5 :https://goo.gl/QJBhJD chalo toh public bus pass hojao aur share karo videos ko whatsapp group apne last moment pe unn dosto ko jo apni tarah last moment pe padhte hai Aur videos CSS ke aane waale hai so Channel ko subscribe jaroor karna follow us on: https://www.instagram.com/last_moment_tuitions https://www.facebook.com/lastmomenttuition https://www.facebook.com/sumerr3
Views: 87569 Last moment tuitions
Cryptographic Hash Functions (Contd...1)
 
50:34
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: 7806 nptelhrd
Message Digest and Digital Signature | Cryptographic Hash Function
 
09:04
This video lecture is produced by S. Saurabh. He is B.Tech from IIT and MS from USA. Message Digest and Digital Signature To study interview questions on Linked List watch http://www.youtube.com/playlist?list=PL3D11462114F778D7&feature=view_all To prepare for programming Interview Questions on Binary Trees http://www.youtube.com/playlist?list=PLC3855D81E15BC990&feature=view_all To study programming Interview questions on Stack, Queues, Arrays visit http://www.youtube.com/playlist?list=PL65BCEDD6788C3F27&feature=view_all To watch all Programming Interview Questions visit http://www.youtube.com/playlist?list=PLD629C50E1A85BF84&feature=view_all To learn about Pointers in C visit http://www.youtube.com/playlist?list=PLC68607ACFA43C084&feature=view_all To learn C programming from IITian S.Saurabh visit http://www.youtube.com/playlist?list=PL3C47C530C457BACD&feature=view_all
Views: 13087 saurabhschool
IOTA tutorial 8: Cryptographic sponge construction
 
07:10
If you like this video and want to support me, go this page for my donation crypto addresses: https://www.youtube.com/c/mobilefish/about This is part 8 of the IOTA tutorial. In this video series different topics will be explained which will help you to understand IOTA. It is recommended to watch each video sequentially as I may refer to certain IOTA topics explained earlier. In 2007, the sponge construction was introduced by Guido Bertoni and others. A sponge construction or sponge function takes input bit data of any length (message) and produce an output bit data of any desired length (hash digest). Simply said, the data is "absorbed" into the sponge, then the result is "squeezed" out.  The sponge function has two phases, the absorbing phase in which the message is compressed iteratively followed by the squeezing phase in which the hash digest is extracted in a iterative manner. A sponge function has three components: A state memory (S) which is divided into two sections: one of size r (the bitrate) and the other of size c (the capacity). For simplicity sake in this video the capacity will be complete ignored. A compression function (f) of fixed length that transforms the state memory. IOTA uses the Keccak-384 hash algorithm as its compression function. Please note this Keccak-384 hash algorithm does not comply with the standardised SHA3-384 as defined by the National Institute of Standards and Technology (NIST). A padding function (pad) which appends enough bits to the input data (M) so that the length of the padded input is a whole multiple of the bitrate r. The padded input can thus be broken into r-bit blocks. The sponge function operates as follows, starting with the absorbing phase: The state memory S is initialised to zero. The padded input is broken into r-bit blocks and called M0, M1, M2, etc. The r-bit block is XORed with the first message block M0 and the result is passed to the compression function f. The function stores its result in the state memory S. The updated r-bit block is XORed with the second message block M1 and the result is passed to function f. Again function f stores its result in the state memory S. The process is repeated until all message blocks M0, M1, M2 etc. are used up. The sponge function squeezing phase, to create the hash digest is as follows: The r-bit block of the state memory is the first r bits of output (Z0). If more output bits are desired the r-bit block is passed to function f. Function f stores its result in the state memory S. The r-bit block of the state memory is the next r bits of output (Z1). The process is repeated until the desired number of output bits are produced. The concatenated values Z0, Z1, Z2, etc, forms the hash digest. If the output length is not a multiple of r bits, it will be truncated. More information about the sponge construction: https://keccak.team/sponge_duplex.html Check out all my other IOTA tutorial videos: https://goo.gl/aNHf1y Subscribe to my YouTube channel: https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: https://www.mobilefish.com/developer/iota/iota_quickguide_tutorial.html #mobilefish #howto #iota
Views: 4526 Mobilefish.com
Salted Password Scheme - Applied Cryptography
 
01:56
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 15611 Udacity
Five* non-cryptographic hash functions enter. One hash function leaves.
 
37:31
Adam Harvey https://linux.conf.au/schedule/30208/view_talk When you say “hash function” in a room full of developers, people tend to think of the classics: MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA-OHGODPLEASESTOP, and the like — cryptographic hash functions intended for cryptographic uses. There’s another world out there, though: non-cryptographic hashes. Sometimes you just need to figure out if you’ve already seen a string or structure. Sometimes you need a basic checksum. Sometimes you need a hash that’s just fast and can fit into a 32 bit integer. I’ll run through the state of the art in the world of non-cryptographic hashing — what your best options are, how they compare in terms of CPU and memory usage, and how they work. Who takes it? Whose mixing function reigns supreme? Let’s find out. * I’m saying “five”, but realistically I’m going to cover as many modern options as I can fit into the time available. Let’s say “five plus or minus two” in reality.
Lecture 20: Hash Functions by Christof Paar
 
01:04:56
For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com
C/C++ Cryptography — Simple CRC32 Brute Force Cracking Algorithm
 
06:05
- Project on Github: https://github.com/Zer0Mem0ry/CrackCRC32 Get My Visual Studio Theme! https://www.patreon.com/posts/how-to-get-and-8806134 • Support me on Patreon: http://www.patreon.com/Zer0Mem0ry • Donate Bitcoin: 1JhSKGgRQmir8rRF4Sm5CP4fDDofKFAypd • Facebook: https://www.facebook.com/Zer0Mem0ry • Twitter: https://www.twitter.com/Zer0Mem0ry
Views: 9302 Zer0Mem0ry
C Programming in Linux Tutorial #063 - Hash Program
 
36:14
C Programming in Linux Tutorial using GCC compiler. Tutorial should also be applicable in C/UNIX programming. An example on how to create a hash program.
Views: 8036 ShellWave
Hashing (OTP) / Hash fuction (meaning and introduction) cryptography and network security in hindi.
 
07:31
Please Fill the form - https://docs.google.com/forms/d/1kOxvqvz1IvBMHJ3UeLecLDuK7ePKjHAvHaRcxduHKEE/edit ====================================================== Answer of your Questions Asked to me. (direct Link given below) Blogger Link - http://shalik-htd.blogspot.com/ ====================================================== Hey, friends, I upload the videos in this channel in Hindi for Engineering student of UPTU and other universities for computer science and IT (information technology) students. like share and subscribe my channel ====================================================== Install C Programming Solution Android app - https://play.google.com/store/apps/details?id=com.shalik.patel.cprogrammingsolution ====================================================== ====================================================== My Career Planning android app - https://play.google.com/store/apps/details?id=guide.mycareer.com.rec.mycareer ====================================================== ====================================================== My Android App for my College Library (An Official App Of College Library) - https://play.google.com/store/apps/details?id=jrv.library.rec.reclibrary ====================================================== How to use android application - https://www.youtube.com/watch?v=1hMZCvl-JxM ====================================================== Contact me on Facebook - https://www.facebook.com/HTD-hub-250593705388294/?ref=br_rs ====================================================== Follow me on twitter - https://twitter.com/PatelShalik ======================================================
8. Hashing with Chaining
 
51:16
MIT 6.006 Introduction to Algorithms, Fall 2011 View the complete course: http://ocw.mit.edu/6-006F11 Instructor: Erik Demaine License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 324856 MIT OpenCourseWare
SHA-2 Cryptographic Hash Function
 
23:35
For clearer illustrations, a .ppsx file (ppt slide show) can be accessed at https://www.dropbox.com/s/j7k4c5nm3zgezp2/ppsxABU_SHA2_Presentation.ppsx
Views: 4899 Patricia Angela Abu
10. Open Addressing, Cryptographic Hashing
 
50:55
MIT 6.006 Introduction to Algorithms, Fall 2011 View the complete course: http://ocw.mit.edu/6-006F11 Instructor: Srini Devadas License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 89861 MIT OpenCourseWare
Cryptographic Hash Function Solution - Applied Cryptography
 
02:23
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 1587 Udacity
C/C++ Cryptography — XOR Encryption | Simple encryption Algorithm
 
01:30
simple program that uses xor encryption algorithm to encrypt a string. • Support me on Patreon: http://www.patreon.com/Zer0Mem0ry • Donate Bitcoin: 1JhSKGgRQmir8rRF4Sm5CP4fDDofKFAypd • Facebook: https://www.facebook.com/Zer0Mem0ry • Twitter: https://www.twitter.com/Zer0Mem0ry
Views: 17390 Zer0Mem0ry
Cryptographic Hash Functions: Part 2
 
29:44
Cryptographic Hash Functions Applications of Crypto Hash Functions Birthday Problem Secure Hash Algorithm (SHA)
Views: 2798 Scholartica Channel
Pigeonhole Principle and Hash Functions (Statistics Examples 5)
 
04:39
Applying the pigeonhole principle to (cryptographic) hash functions to determine how many inputs collide on a single hash value.
Views: 1456 Steven Gordon
How secure is 256 bit security?
 
05:06
Supplement to the cryptocurrency video: How hard is it to find a 256-bit hash just by guessing and checking? What kind of computer would that take? Cryptocurrency video: https://youtu.be/bBC-nXj3Ng4 Home page: https://www.3blue1brown.com/ Several people have commented about how 2^256 would be the maximum number of attempts, not the average. This depends on the thing being attempted. If it's guessing a private key, you are correct, but for something like guessing which input to a hash function gives the desired output (as in bitcoin mining, for example), which is the kind of thing I had in mind here, 2^256 would indeed be the average number of attempts needed, at least for a true cryptographic hash function. Think of rolling a die until you get a 6, how many rolls do you need to make, on average? Music by Vince Rubinetti: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 1124468 3Blue1Brown
NETWORK SECURITY - HMAC ALGORITHM
 
20:58
www.youtube.com/c/sundeepsaradhi
8. Randomization: Universal & Perfect Hashing
 
01:21:51
MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Erik Demaine In this lecture, Professor Demaine reviews hashing in the context of randomized algorithms. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 30031 MIT OpenCourseWare
Hash Function
 
34:17
Views: 2668 Internetwork Security
DES -- The Algorithm
 
09:06
DES -- Data Encryption Standard -- has been the workhorse of modern cryptography for many decades. It has never been compromised mathematically (not in the open literature, at least), yet, its design notes were never made public either. Many who use it are unaware of how it works. Here we open the DES box and find inside a repetition of sub-boxes in which very simple primitives are at work: substitution, transposition, split, concatenation, and bit-wise operation. DES inside teaches us that complexity is comprised of a lot of simplicity.
Views: 148323 Gideon Samid
الفرق بين الهاش والتشفير
 
23:51
نجيب في هذه الحلقة على مفهومان قريبان من بعضهما وهما #التشفير و #الهاش ما هي خوارزميات التشفير ؟ ما هي خوارزميات الهاش ؟ ما الفرق بين خوارزميات الهاش ؟ كيف تعمل خوارزميات الهاش؟ كتابة كود خوارزمية الـ #MD5 ؟ كتابة كود خوارزمية الـ #sha1؟ كتابة كود خوارزمية الـ #sha256؟ كتابة كود خوارزمية الـ #sha384؟ كتابة كود خوارزمية الـ #sha512؟ كيف تعمل خوارزميات التشفير؟ كتابة كود خوارزمية تشفير ؟ نقارن ما بين التشفير والهاش من خلال تتبع طريقة العمل! ما الفروقات الاساسية بين الهاش والتشفير؟ كيف يتم فك التشفير ؟ كيف يتم فك الهاش ؟ ما هي استخدمات الـ #hash ؟ ما هي أستخدمات الـتشفير ؟ فوائد الهاش ؟ فوائد التشفير ؟ ▁ ▂ ▃ ▄ ▅ ▆ ▇ ▆ ▅ ▃ ▂ ▁ سبحان الله وبحمدة سبحان الله العظيم شكرا لكم أحبتي على تواصلكم وتعليقاتكم ودعمكم المتواصل ^_^ ▁ ▂ ▃ ▄ ▅ ▆ ▇ ▆ ▅ ▃ ▂ ▁ ✔ تيليجرام :- https://telegram.me/blog_prof_jo ✔ فيسبوك :- https://www.facebook.com/UpdateLap ✔ أنستقرام :- https://instagram.com/UpdateLap ✔ توتير:-- https://twitter.com/UpdateLap ✔ موقعنا :- https://UpdateLap.blogspot.com ▁ ▂ ▃ ▄ ▅ ▆ ▇ ▆ ▅ ▃ ▂ ▁ ✔ صفحتي الشخصية :- ✔ https://www.facebook.com/profile.php?id=100002271816418 ✔ https://www.instagram.com/jafar_abu_nada/ #Update #اب_ديت jafar abu nada - #جعفر_أبو_ندى ما هو ال hashing وما الفرق بينه وبين التشفير encryption ؟ Encoding vs. Encryption vs. Hashing vs. Obfuscation
Views: 21637 Update - أب ديت
Hashing - Collision Resolution with Linear Probing (Open Addressing)
 
16:42
This video lecture is produced by S. Saurabh. He is B.Tech from IIT and MS from USA. Hashing - collision resolution with closed hashing / open addressing Collision resolution with linear probing linear probing hashing example analysis of linear probing hashing individual displacements linear probing hashing asymptotic distribution the cost linear probing hashing exact distribution individual displacements linear probing load factor linear probing hashing linear probing example linear probing hash table example To study interview questions on Linked List watch http://www.youtube.com/playlist?list=PL3D11462114F778D7&feature=view_all To prepare for programming Interview Questions on Binary Trees http://www.youtube.com/playlist?list=PLC3855D81E15BC990&feature=view_all To study programming Interview questions on Stack, Queues, Arrays visit http://www.youtube.com/playlist?list=PL65BCEDD6788C3F27&feature=view_all To watch all Programming Interview Questions visit http://www.youtube.com/playlist?list=PLD629C50E1A85BF84&feature=view_all To learn about Pointers in C visit http://www.youtube.com/playlist?list=PLC68607ACFA43C084&feature=view_all To learn C programming from IITian S.Saurabh visit http://www.youtube.com/playlist?list=PL3C47C530C457BACD&feature=view_all
Views: 168156 saurabhschool
IOTA tutorial 18: Merkle Tree
 
06:33
If you like this video and want to support me, go this page for my donation crypto addresses: https://www.youtube.com/c/mobilefish/about This is part 18 of the IOTA tutorial. In this video series different topics will be explained which will help you to understand IOTA. It is recommended to watch each video sequentially as I may refer to certain IOTA topics explained earlier. The main objective of this video is to provide you with some basic knowledge about the Merkle tree. The Merkle tree is used in IOTA's Masked Authenticated Messaging. IOTA's Masked Authenticated Messaging will be explained in IOTA tutorial 19. A hash tree or Merkle tree is a tree structure in which each leaf node is a hash of a block of data and each non-leaf node is a hash of its children. This results in a single hash called the Merkle root. If every node has two children, the tree is called a binary hash tree. Why use a Merkle tree? Why not hash all messages (m0-m15), append the hashed messages and then hash it all to get one root hash value. Bob get the root hash from a trusted source. If Alice wants to proof to Bob that m6 is not tampered with, she needs to send message m6 and all other hashed values: H(m0), H(m1), H(m2), H(m3), H(m4), H(m5), H(m7), H(m8), H(m9), H(m10), H(m11), H(m12), H(m13), H(m14) and H(m15) to Bob. Bob hashes message m6, append all hashes to a single string and hash this string to get one root hash. Bob compares this new root hash with the trusted source root hash to check if message m6 is not tampered with. In this example Alice has to provide 15 hashed values and the message m6 to Bob to prove that message m6 is not tampered with. A much better solution is using a Merkle tree (16 leaves) Again as before Bob gets the root hash from a trusted source. If Alice wants to proof that m6 is not tampered with, she needs to send m6 and 4 hashed values to Bob. With the received information Bob calculates the root hash value. Bob compares this root hash with the trusted source root hash to check if message m6 is not tampered with. In this example Alice only needs to provide 4 hashed values and the message m6 to Bob to prove that message m6 is not tampered with. Using a Merkle tree provides integrity and validity of your data using a small amount of data that a trusted authority has to maintain. This also means little memory / disk space is needed. If a Merkle tree has more leaves less hashed values are needed, in comparison to the number of leaves, to validate if a message is not tampered with. A perfect Merkle binary tree has the following properties: - The number of leaves is always 2n (n=0, 1, 2, 3,..). - Each node has 0 or 2 children. - All leaves are on the same level. In a perfect binary tree the following formulas can be applied: Total number of leaves = L = (N + 1) / 2 Total number of nodes = N = 2L - 1 Total number of levels = LV = log2(L) + 1 = (ln(L) / ln(2)) + 1 Number of leaves = L = 1 Number of nodes = N = 1 Number of levels = LV = 1 Number of leaves = L = 2 Number of nodes = N = 3 Number of levels = LV = 2 Number of leaves = L = 4 Number of nodes = N = 7 Number of levels = LV = 3 Number of leaves = L = 8 Number of nodes = N = 15 Number of levels = LV = 4 Number of leaves = L = 16 Number of nodes = N = 31 Number of levels = LV = 5 Check out all my other IOTA tutorial videos: https://goo.gl/aNHf1y Subscribe to my YouTube channel: https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: https://www.mobilefish.com/developer/iota/iota_quickguide_tutorial.html #mobilefish #howto #iota
Views: 12029 Mobilefish.com
How to code symmetric Encryption and Decryption Program with C++ (c++ learning)
 
08:37
Download Code: https://www.dropbox.com/s/7wzs7g0c51jcb84/symmetric%20Encryption.cpp?dl=0 In this video you will learn, How to code symmetric Encryption and Decryption Program with C++. 1. all you need to have a compiler in my case i'm using DevC++. 2. on each change you must compile the whole program before execute it. 3. Don't forget to subscribe to my channel. for any question post comment or email me: khaliqdadmohman[email protected]
Views: 3241 Khaliq Izrail Haxor
Hash table hash function
 
17:21
Related Videos: Hash table intro/hash function: https://www.youtube.com/watch?v=2E54GqF0H4s Hash table separate chaining: https://www.youtube.com/watch?v=T9gct6Dx-jo Hash table separate chaining code: https://www.youtube.com/watch?v=Av9kwXkuQFw Hash table open addressing: https://www.youtube.com/watch?v=xIejolxzZS8 Hash table linear probing: https://www.youtube.com/watch?v=Ma9XOInZJWM Hash table quadratic probing: https://www.youtube.com/watch?v=b0858c55TGQ Hash table double hashing: https://www.youtube.com/watch?v=H5e9V5x92vI Hash table open addressing removing: https://www.youtube.com/watch?v=7eLDTtbzX4M Hash table open addressing code: https://www.youtube.com/watch?v=7eLDTtbzX4M Data Structures Source Code: https://github.com/williamfiset/data-structures My website: http://www.williamfiset.com
Views: 2566 WilliamFiset