|
| |
| | Code (cryptography) - encyclopedia article about Code (cryptography). |
 | | Constructing a new code is like building a new language and writing a dictionary for it, which was an especially big job before computers. | | | As well as providing security, a well designed code can also compress In computer science, data compression or source coding is the process of encoding information using fewer bits (or other information-bearing units) than a more obvious representation would use, through use of specific encoding schemes. | | | For example, in a code using numeric code groups, a plaintext word starting with "a" would have a low-value group, while one starting with "z" would have a high-value group. |
|
http://encyclopedia.thefreedictionary.com/Code+(cryptography)
(2647 words)
|
|
| |
| | Code - Encyclopedia.WorldSearch |
| | Acronyms and abbreviations can be considered codes, and in a sense all languages and writing systems are codes for human thought. | | | A codec is an implementation of that rule (or algorithm) for coding and decoding, for example MP3, which may be a hardware implementation or a software implementation, and which may include compression. | | | In communications, a code is a rule for converting a piece of information (for example, a letter, word, or phrase) into another form or representation, not necessarily of the same sort. |
|
http://encyclopedia.worldsearch.com/encode.htm
(903 words)
|
|
| |
| | Cryptography Technology |
| | The source code for the algorithm is in C but there is a C++ interface as well. | | | The new code also supports x86 assembler versions for both integer and MMX operations and can achieve about 17 cycles per byte on a P4 processor (the best code achieves about 14 cycles per byte but is not free). | | | Here is a zip file containing the example source code and a binary executable for Windows in console mode. |
|
http://fp.gladman.plus.com/cryptography_technology/rijndael
(1735 words)
|
|
| |
| | Vigenere Cipher |
| | Faith uses this routine as part of a unit on 'Codes, Coding, and Cryptography' in a course for Computer and Information Science majors. | | | In this routine the code table of Figure 4b is used. | | | Level: Finite mathematics, linear algebra, or a computer science course that includes a unit on cryptography. |
|
http://astro.ocis.temple.edu/~dhill001/vigenere/vigenere.html
(1653 words)
|
|
| |
| | The Laws of Cryptography: Hamming Code |
| | The Hamming code has been used for computer RAM, and is a good choice for randomly occurring errors. | | | Law HAMMING1: The binary Hamming code is particularly useful because it provides a good balance between error correction (1 error) and error detection (2 errors). | | | Three or more errors at the same time can show up as no error, as two errors detected, or as a single error that is ``corrected'' with a bogus correction. |
|
http://www.cs.utsa.edu/~wagner/laws/hamming.html
(937 words)
|
|
| |
| | ktheory: IB Extended Essay: Allied Codebreaking During World War II |
| | This code was based on a codebook, in which each Japanese word was given a 5-digit numerical code. | | | This paradigm shift from linguistics (used on codes that enchiphered words as a single unit) to mathematics (used on codes that enciphered each letter) was significant to World War II cryptology. | | | At Bletchley Park, British code headquarters, Alan Turing, one of the greatest mathematicians at the time and the first person to conceive of a modern digital computer, had amazing insight into codebreaking and problem solving in general. |
|
http://www.ktheory.com/archives/2000/02/14/ib_extended_ess.php
(4275 words)
|
|
| |
| | The Laws of Cryptography: the Huffman Code |
| | Huffman codes are always optimal (the best possible), but this particular code has average code length equal to the entropy, and it is never possible to create a code with shorter average length. | | | The Huffman code starts with a sequence of symbols (a "file") and computes the percent frequency of each symbol. | | | Even though Huffman's code is optimal (it yields the best possible code for a collection of symbols and frequencies), the other adaptive algorithms (LZ or LZW) usually do a much better job of compressing a file. |
|
http://www.cs.utsa.edu/~wagner/laws/huffman.html
(2369 words)
|
|
| |
| | Cryptography |
| | They have published what they claim to be the source code in book form, which is apparently being scanned into the computer by S Schumacher who will apparently release an "international" version. | | | Judge Pattel ruled that source code was protected speech under the First Ammendment and that the ITAR and Commerce regulations violated the First Ammendment by not instituting sufficient safeguards against capricious and arbitrary decisions by the executive branch. | | | However cryptography is included elsewhere, as is freely available software. |
|
http://axion.physics.ubc.ca/crypt.html
(4841 words)
|
|
| |
| | Java Cryptography Extension |
| | In the case of JCE, the "resources" are cryptography algorithms, and code sources do not need to be specified, because the cryptographic restrictions apply to all code. | | | Cryptography Extension (JCE) provides a framework and implementations for encryption, key generation and key agreement, and Message Authentication Code (MAC) algorithms. | | | Provider vendors can either modify their provider to follow the recommended approach for authenticating the framework, or put in a conditional so that the framework authentication code is only executed when the provider is being run with JCE 1.2.1. |
|
http://java.sun.com/j2se/1.4.2/docs/guide/security/jce/JCERefGuide.html
(11048 words)
|
|
| |
| | Cryptography Technology |
| | RIjndael has been selected as the AES algorithm and here is my code for the algorithm in C++. | | | The code described and provided here puts a number of the algorithms available on these pages together to provide an example of password based file encryption. | | | I am taking a strong interest in the AES activity and, since my interests are in implementation, I have decided to see what is involved in implementing a number of the AES candidate algorithms from scratch using the paper descriptions rather than any published source code as a basis. |
|
http://fp.gladman.plus.com/cryptography_technology
(559 words)
|
|
| |
| | Java Cryptography Architecture |
| | Code being executed is always considered to come from a particular "code source". | | | The subclass constructor sets the values of various properties that are required for the Java Cryptography API to look up the algorithms or other facilities the provider implements. | | | Some provider source code may be available for review and evaluation, while some may not. |
|
http://java.sun.com/j2se/1.4.2/docs/guide/security/CryptoSpec.html
(10851 words)
|
|
| |
| | Category:Cryptography - Wikipedia, the free encyclopedia |
| | Cryptography is now often built into the infrastructure for computing and telecommunications; users may not even be aware of it's presence. | | | Cryptography is, traditionally, the study of ways to convert information from its normal, comprehensible form into an obscured guise, unreadable without special knowledge — the practice of encryption. | | | Articles on this topic in other Wikimedia projects can be found at: Wikimedia Commons Category Cryptography |
|
http://en.wikipedia.org/wiki/Category:Cryptography
(169 words)
|
|
| |
| | Cryptography |
| | Cryptography Overview - A nice tutorial on what cryptography is from the National Institute of Standards and Technology. | | | According to the author, "The most straightforward application of quantum cryptography is in distribution of secret keys." In essence, the keys are kept secret by the laws of physics rather than by mathematics. | | | You'd Have to Break the Laws of Physics to Break This Code - The article states that scientists are a step closer to creating secret codes that are absolutely unbreakable which advances hopes for protecting sensitive data from any kind of computer attack. |
|
http://csc.colstate.edu/summers/e-library/crypto.html
(5573 words)
|
|
| |
| | Cryptography Software Code in Visual Basic and C |
| | Here is Bruce Schneier's code in C for his Blowfish algorithm. | | | BigDigits: Multiple-precision arithmetic algorithms source code in ANSI C Version 2.0. | | | The code in basMD5.bas contains an implementation of the MD5 algorithm in VB6/VBA. |
|
http://www.di-mgt.com/crypto.html
(4277 words)
|
|
| |
| | Amazon.co.uk: Applied Cryptography: Protocols, Algorithms and Source Code in C: Books |
| | This is a good solid review of most current cryptography with source code available for software programmers. | | | The only qualms I had was that despite advertising "Protocols, Algorithms and Source Code in C" the book includes only source code right at the very end, to a handful of encryption algorithms. | | | the definitive work on cryptography for computer programmers... |
|
http://www.amazon.co.uk/exec/obidos/ASIN/0471117099
(774 words)
|
|
| |
| | PGP Corporation - Downloads - Source Code |
| | Users finding what they believe are problems in the source code should follow the procedure described in the license for reporting perceived flaws. | | | PGP Corporation is the only commercial secure-messaging vendor to publish source code for peer review so customers and cryptography experts may validate product integrity. | | | The source code for PGP Desktop is available for peer review. |
|
http://www.pgp.com/downloads/sourcecode
(780 words)
|
|
| |
| | Open Directory - Computers: Hacking: Cryptography |
| | Cryptography FAQ - Ten part FAQ list that is essential reading for any newcomer to cryptography. | | | Frode Weierud's Cryptology Page - History of cryptography, cipher machines and their simulation, cryptanalysis and other code breaking techniques. | | | CryptoMX Tools - Set of cryptography tools written entirely in JavaScript, designed to work on any computer with a JavaScript capable browser. |
|
http://dmoz.org/Computers/Hacking/Cryptography
(554 words)
|
|
| |
| | The Code War - In Cryptography We Trust |
| | This makes public-key cryptography perfect for the world of electronic commerce. | | | A report from the Computer Science and Telecommunications Board of the National Research Council. | | | Mathematical Moments - "Securing Internet Communication" and other PDF flyers for use in teaching and promoting mathematics. |
|
http://www.beyonddiscovery.org/content/view.page.asp?I=3426
(995 words)
|
|
| |
| | perl.com: Symmetric Cryptography in Perl |
| | For a particular key, one could build an exhaustive table (or Code Book) of plaintext blocks and their ciphertext counterparts. | | | From a cryptographic perspective, however, there are still some problems we must consider. | | | Then, instead of actually encrypting the plaintext, one could simply look at the relevant entries in the table to find the ciphertext. |
|
http://www.perl.com/pub/a/2001/07/10/crypto.html
(978 words)
|
|
| |
| | 411ASP.NET: ASP.NET .Cryptography - ASP.NET tutorial, script, code, controls |
| | He discusses reasons why cryptography is easier in.NET than it was before. | | | This How To shows you how to create a managed class library that exposes DPAPI functionality to applications that want to encrypt data, for example, database connection strings and account credentials. | | | This How To shows you how to store and retrieve encrypted strings in the registry. |
|
http://www.411asp.net/home/tutorial/specific/security/cryptogr?pg=1&order=desc
(301 words)
|
|
| |
| | Cryptography - Authoritative Source for Cryptography, Encryption and Digital Certificate News |
| | The quantum cryptography is expected to be the last resort of the cryptography protocol, and to enhance enormously the safety of transmitting information. | | | Dr. Walter, Head of Cryptography for Comodo Inc. and chair of the Trusted Computing Group (TCG) Peripheral Working Group, has clarified the relationship between encryption and authentication. | | | Debian: New ethereal packages fix arbitrary code execution |
|
http://www.linuxsecurity.com/content/blogcategory/67/86
(1516 words)
|
|
| |
| | Piracy.com: International Cryptography Freedom |
| | This is the source code that Netscape used in Communicator and is now used in the iPlanet servers (http://www.iplanet.com/) | | | The Project was started to make open source cryptographic software freely available in situations where it difficult to obtain the software from its original authors. | | | We've been asked what to mirror if it is not possible to mirror large archives (200 MB and up), or you can't easily decide which programs are most important. |
|
http://www.piracy.com
(2654 words)
|
|
| |
| | Bookpool: The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography |
| | From Mary, Queen of Scots, trapped by her own code, to the Navajo Code Talkers who helped the Allies win World War II, to the incredible (and incredibly simple) logisitical breakthrough that made Internet commerce secure, The Code Book tells the story of the most powerful intellectual weapon ever known: secrecy. | | | Applied Cryptography: Protocols, Algorithms, and Source Code in C, 2nd Edition; Bruce Schneier, $36.50, | | | Bookpool: The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography |
|
http://www.bookpool.com/.x/pbx84hrb8i/sm/0385495323
(419 words)
|
|
| |
| | Codes, Ciphers & Secret Messages |
| | Decipher the code; each letter in a phrase has been replaced by another. | | | This site contains a outline of the various types of cipher systems that have been used historically, and tries to relate them to each other while avoiding a lot of mathematics. | | | - A code is a system of symbols, letters, words, or signals that are used instead of ordinary words and numbers to send messages or store information. |
|
http://www.42explore2.com/codes.htm
(584 words)
|
|
| |
| | Paj's Home: Cryptography: JavaScript MD5 |
| | Also, the information about writing a login system has been much expanded, although the online example is not currently working. | | | In any case, JS interpreters are not designed for secure programming. | | | The code works with most JavaScript implementations; Andrew Kepert has written a browser compatibility test with on-line results. |
|
http://pajhome.org.uk/crypt/md5
(691 words)
|
|
| |
| | Cryptography Research: Resources |
| | Cryptography is an exciting field for scientists, engineers, mathematicians and others who enjoy solving complex challenges. | | | See cutting-edge papers and research from the Cryptography Research team, arranged topically. | | | Cryptography plays an essential role in securing commercial and government applications including communications, payment systems, access and identification solutions, and more. |
|
http://www.cryptography.com/resources
(83 words)
|
|
| |
| | SimonSingh.net |
| | In 1999 I published The Code Book, a history of codes and code breaking from Ancient Egypt to the Internet. | | | history and development of codes over the centuries. | | | In fact, there is a ton of Fermat-related material and lots of other pages about mathematics in general, cryptography, my books, other science books and a whole load of other things that just happened to tickle my somewhat fickle fancy. |
|
http://www.simonsingh.net
(746 words)
|
|
| |
| | The Nazca Lines, Peru, W South America |
| | Someone, long ago, went to extremes in positioning these coded objects around the world and they did so with numbers. | | | I call this clever arrangement "THE CODE" and have since 1985, a few years after I began deciphering such artifacts. | | | We live in a very ancient codified world, a global encyclopedia every page of which is represented by an ancient pyramid, mound, effigy, stone and earthworks. |
|
http://www.pyramidmatrix.com/nazca_lines.htm
(562 words)
|
|
| |
| | WeberDev.com - PHP & MySQL Code examples, tutorials, Classes, web development resources |
| | WeberDev.com - PHP & MySQL Code examples, tutorials, Classes, web development resources | | | WeberContent : : System Services : : Uptime Monitor : : Web Development Jobs : : Beginner Guides : : web development forums : : PHP Code Examples : : PHP Articles : : PHP Classes : : PHP Tool bar : : Manuals : : Site Map : : Project Matching : : | | | Learn to create & customize dozens of Flash Effects |
|
http://www.weberdev.com
(234 words)
|
|
| |
| | Cryptography Archive |
| | A comprehensive Internet security portal featuring the latest news, alerts, software, tutorials, and original content for computer security, virus protection, and privacy online. | | | PGP 5.0 Source Code Posted on University of Oslo's Web Site | | | Francis Bacon as the author of Shakespeare's Works |
|
http://austinlinks.com/Crypto
(78 words)
|
|
| |
| | Security and Cryptography for Mobile Code |
| | Infrastructure for Proof-Referencing Code, by Carl Gunter, Peter Homeier, Scott Nettles. | | | Pircay, the Dark Side of Electronic Commerce, by Arnaud Sahuguet (May 1998) | | | This paper received the "Best Paper Award" at OSDI'96. |
|
http://www.cis.upenn.edu/~sahuguet/PLAN/Agent_Security.html
(154 words)
|
|
| |
| | Navajo, Comanche, WW2, Code, cryptography, radio |
| | The US searched frantically for a new unbreakable super code. | | | Some of the recruits were put to work developing a cryptographic code. | | | The guards had standing orders to kill the Code Talker rather than risk compromising the code. |
|
http://www.thalls.org/radio/articles/codetlk.htm
(628 words)
|
|
| |
| | NOVA Online Decoding Nazi Secrets |
| | Secret codes are not just for spies; they protect your online credit-card purchases, for instance. | | | Learn some of the tricks codebreakers use to solve ciphers, then use your new talents to make sense of what looks like a bunch of gibberish. |
|
http://www.pbs.org/wgbh/nova/decoding
(263 words)
|
|
| |
| | Classical Cryptography |
| | z reset the code to its initial state. | | | W Diffie, M E Hellman, "Privacy and Authentication: An Introduction to Cryptography", in Proc. |
|
http://williamstallings.com/Extras/Security-Notes/lectures/classical.html
(2501 words)
|
|
| |
| | Break the Code : Cryptography for Beginners |
| | This simply and clearly written book, filled with cartoons and easy-to-follow instructions tells youngsters 8 and up how to break six different types of coded messages. | | | Add this book to your wish list |
|
http://www.allbookstores.com/book/0486291464
(60 words)
|
|
|
