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Topic: MD5

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Cryptographic hash function

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MD2

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Xor swap algorithm

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Cyclic redundancy check

Checksum

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	MD5 algorithm specification
		The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA.
		The MD5 algorithm is an extension of the MD4 message-digest algorithm 1,2].
		MD5 was designed because it was felt that MD4 was perhaps being adopted for use more quickly than justified by the existing critical review; because MD4 was designed to be exceptionally fast, it is "at the edge" in terms of risking successful cryptanalytic attack.
	www.kleinschmidt.com /edi/md5.htm (2581 words)

	MD5: Command Line Message Digest Utility
		The MD5 algorithm has been implemented in numerous computer languages including C, Perl, and Java; if you're writing a program in such a language, track down a suitable subroutine and incorporate it into your program.
		This md5 program was originally developed as part of a suite of tools intended to monitor large collections of files (for example, the contents of a Web site) to detect corruption of files and inadvertent (or perhaps malicious) changes.
		md5 returns status 0 if processing was completed without errors, 1 if the -c option was specified and the given signature does not match that of the input, and 2 if processing could not be performed at all due, for example, to a nonexistent input file.
	www.fourmilab.ch /md5 (902 words)

	Digest::MD5 - perldoc.perl.org
		Note that the MD5 algorithm is not as strong as it used to be.
		It still seems hard to generate messages that produce a given digest, but it is probably wise to move to stronger algorithms for applications that depend on the digest to uniquely identify a message.
		Since the MD5 algorithm is byte oriented you might only add bits as multiples of 8, so you probably want to just use add() instead.
	perldoc.perl.org /Digest/MD5.html (1235 words)

	MD5 - openSUSE
		MD5 was designed by Ronald Rivest in 1991 to replace an earlier hash function, MD4.
		MD5 is one of a series of message digest algorithms designed by Professor Ronald Rivest of MIT (Rivest, 1994).
		Now that it is easy to generate MD5 collisions, though, it is possible for the person who creates the file to create a second file with the same checksum, so this technique cannot protect against some forms of malicious tampering.
	en.opensuse.org /MD5 (1167 words)

	Digest::MD5 - Perl interface to the MD5 Algorithm
		Same as md5(), but will return the digest as a base64 encoded string.
		The MD5 algorithm is defined in RFC 1321.
		License is also granted to make and use derivative works provided that such works are identified as ``derived from the RSA Data Security, Inc. MD5 Message-Digest Algorithm'' in all material mentioning or referencing the derived work.
	www.xav.com /perl/site/lib/Digest/MD5.html (696 words)

	MD5 Homepage (unofficial)
		MD5 was developed by Professor Ronald L. Rivest of MIT.
		MD5 support is now built-in to recent perls, and called Digest::MD5.
		Several people have written in to say that MD5 is a builtin for Python.
	userpages.umbc.edu /~mabzug1/cs/md5/md5.html (682 words)

	TCLLIB - Tcl Standard Library: md5
		The MD5 algorithm is related to the MD4 algorithm (2) but has been strengthened against certain types of potential attack.
		MD5 should be used in preference to MD4 for new applications.
		For the programmer, the MD5 hash can be viewed as a bucket into which one pours data.
	tcllib.sourceforge.net /doc/md5.html (588 words)

	md5
		When the software is fetched, the user may recompute the md5 hash and compare it to the public md5 hash to have confidence that the downloaded distribution is indeed the one that was originally published.
		For MD5, the enahancements involve adding another round, adding a unique constant into each step, changing the round 2 function G to be less symmetrical.
		If filename2 is given, and its md5 digest differs from the first, this is reported on stdout, and return code is 1.
	wiki.tcl.tk /md5 (641 words)

	MD5 Password Hashes Cracker: Recover Password Using MD5 Hash
		MD5 Password is a password recovery tool for security professionals, which can be used to recover a password if its MD5 hash is known.
		MD5 is an industry standard hash algorithm that is used in many applications to store passwords.
		MD5 Password supports the distributed recovery technology, which allows you to utilize the power of several computers when performing the recovery process, drastically reducing the recovery time.
	lastbit.com /md5password (299 words)

	MD5 Hashing Function - Version 1.0 (Site not responding. Last check: 2007-10-08)
		MD5 was designed by Ron Rivest, who is also the `R' in `RSA' in 1991.
		The MD5 algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input.
		The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA or PGP.
	www.w3.org /TR/1998/REC-DSig-label/MD5-1_0 (521 words)

	What is MD5? - a definition from Whatis.com (Site not responding. Last check: 2007-10-08)
		MD5, which was developed by Professor Ronald L. Rivest of MIT, is intended for use with digital signature applications, which require that large files must be compressed by a secure method before being encrypted with a secret key, under a public key cryptosystem.
		According to the standard, it is "computationally infeasible" that any two messages that have been input to the MD5 algorithm could have as the output the same message digest, or that a false message could be created through apprehension of the message digest.
		The MD5 algorithm is an extension of MD4, which the critical review found to be fast, but possibly not absolutely secure.
	searchsecurity.techtarget.com /sDefinition/0,,sid14_gci527453,00.html (446 words)

	MD5 - Wikipedia, the free encyclopedia
		In 1996, a flaw was found with the design of MD5; while it was not a clearly fatal weakness, cryptographers began to recommend using other algorithms, such as SHA-1.
		MD5 was designed by Ronald Rivest (one of the inventors of the RSA algorithm) in 1991.
		When analytic work indicated that MD5's predecessor—MD4—was likely to be insecure, MD5 was designed in 1991 to be a secure replacement (weaknesses were indeed subsequently found in MD4 by Hans Dobbertin).
	en.wikipedia.org /wiki/MD5 (1146 words)

	What is MD5? - A Word Definition From the Webopedia Computer Dictionary
		It is intended for use with 32 bit machines and is safer than the MD4 algorithm, which has been broken.
		MD5 is a one-way hash function, meaning that it takes a message and converts it into a fixed string of digits, also called a message digest.
		When using a one-way hash function, one can compare a calculated message digest against the message digest that is decrypted with a public key to verify that the message hasn't been tampered with.
	www.webopedia.com /TERM/M/md5.html (129 words)

	MD5 Hash codes
		MD5 is used here as a security program, you do not need it in order to use any of the files that you can download here.
		Checking the MD5 hash will ensure that the hash on the web page is the same as the MD5 hash of the file that you download.
		The MD5 program is available in many places on the web so endulging in item 2 will do no good (go to a search engine and type in "MD5", somewhere there will be one to download).
	ourworld.compuserve.com /homepages/pagrosse/hash.htm (1051 words)

	Maresware software for computer forensics, data analysis--program titles L-O
		Md5 is designed to quickly calculate the MD5 hash value of a file.
		When information is distributed with the MD5 signature value, the MD5 program can be used to validate the integrity of the data.
		It can take a set of files with a sequential extension (.000,.001,.002 etc) and perform MD5 or SHA1 on the files as if they were a single file.
	www.dmares.com /maresware/lo.htm (1807 words)

	CAST MD5 Processor Core
		This core is a fully compliant hardware implementation of the Message Digest Algorithm MD5, suitable for a variety of applications.
		The MD5 algorithm is an improved version of the MD4, created by Professor Ronald L. Rivest of MIT and is closely modeled after that algorithm.
		The MD5 core is ready to accept data when REQ is asserted.
	www.cast-inc.com /cores/md5/index.shtml (691 words)

	Roxen Community: RFC 1321 The MD5 Message-Digest Algorithm () (Site not responding. Last check: 2007-10-08)
		The message digest produced as output is A, B, C, D. That is, we begin with the low-order byte of A, and end with the high-order byte of D. This completes the description of MD5.
		The MD5 message-digest algorithm is simple to implement, and provides a "fingerprint" or message digest of a message of arbitrary length.
		The driver compiles for MD5 by default but can compile for MD2 or MD4 if the symbol MD is defined on the C compiler command line as 2 or 4.
	community.roxen.com /developers/idocs/rfc/rfc1321.html (3425 words)

	Schneier on Security: More Hash Function Attacks
		MD5, the beloved hash algorithm that most of us make use of daily (No really, you do), is dead.
		The fact that MD5 hashes for two completely different sources could be the same was heard by me years ago.
		The only thing to remember: MD5 assures the file was not altered; it doesn't assure two files are the same if their MD5 are the same, or two files are different if their MD5 are different.
	www.schneier.com /blog/archives/2005/03/more_hash_funct.html (2536 words)

	PHP Help: md5 - PHP Manual
		Calculate the md5 hash of a string', CAPTION, 'md5');" onmouseout="return nd();">md5 digest is instead returned in raw binary format with a length of 16.
		Calculate the md5 hash of a string', CAPTION, 'MD5');" onmouseout="return nd();">MD5 is _not_ encryption in a traditional sense.
		Calculate the md5 hash of a string', CAPTION, 'MD5');" onmouseout="return nd();">MD5 digest (or hash) of a message simply creates 128 bits that can be used to almost positively identify that message or object in the future.
	www.phpfreaks.com /phpmanual/page/function.md5.html (724 words)

	MD5 Hash - WhitSoft Development (via CobWeb/3.1 planetlab2.cs.unc.edu) (Site not responding. Last check: 2007-10-08)
		This is a simple utility that will calculate the MD5 hash of a given file.
		It features a progress bar during calculation and a text field from which the final MD5 hash can be easily copied to the clipboard.
		This utility conforms to the MD5 specification set forth in IETF RFC1321.
	www.whitsoftdev.com.cob-web.org:8888 /md5 (282 words)

	Frez Systems Limited - Bespoke software development for Windows and the Web
		The MD5 algorithm is one of the industry standard methods for generating digital signatures.
		A common use for MD5 is for password encryption as it is one-way in nature, that does not mean that your passwords are not free from a dictionary attack.
		Method 2: Generates a 25 character alpha-numeric key, the first 9 characters are completely random, the next 16 are based on an MD5 digest of the first 9 random characters plus an application specific string.
	www.frez.co.uk /freecode.htm (1216 words)

	File Extension Details for .MD5
		The MD5 checksum file can be used in combination with many type files.
		IsoBuster opens the MD5 file and automatically loads the CD/DVD image file described in the MD5 file and automatically performs a checksum test to see if the image is correct.
		MD5 files are often distributed in combination with CD/DVD image files over the Internet.
	filext.com /detaillist.php?extdetail=MD5 (814 words)

	Crypto researchers abuzz over flaws \| Tech News on ZDNet
		While their results are preliminary, these discoveries could eventually make it easier for intruders to insert undetectable back doors into computer code or to forge an electronic signature--unless a different, more secure algorithm is used.
		The MD5 and SHA-1 algorithms are known to computer scientists as hash functions.
		The open-source Apache Web server product uses MD5 hashes to assure the public that source code on dozens of mirror sites is not modified and is safe to run.
	news.zdnet.com /2100-1009_22-5313655.html (1145 words)

	RSA Security - 3.6.6 What are MD2, MD4, and MD5? (via CobWeb/3.1 planetlab2.cs.unc.edu) (Site not responding. Last check: 2007-10-08)
		MD2 [Kal92], MD4 [Riv91b] [Riv92b], and MD5 [Riv92c] are message-digest algorithms developed by Rivest.
		MD2 was optimized for 8-bit machines, whereas MD4 and MD5 were aimed at 32-bit machines.
		For a comparison of these different techniques and their impact the reader is referred to [Rob96].
	www.rsasecurity.com.cob-web.org:8888 /rsalabs/node.asp?id=2253 (528 words)

	md5deep
		That is, compute the MD5 for every file in a directory and for every file in every subdirectory.
		[MD5] takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input.
		Some weaknesses have been found in MD5 and the above statement may no longer be accurate.
	md5deep.sourceforge.net (884 words)

	[No title]
		Note: A printable version of the manual in pdf format is available from php.net.
		md5 -- Calculate the md5 hash of a string
		, then the md5 digest is instead returned in raw binary format with a length of 16.
	www.zend.com /manual/function.md5.php (99 words)

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