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Topic: RIPEMD

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RIPEMD 160

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	The RIPEMD-160 page
		At the rump session of Crypto 2004 it was announced that Xiaoyun Wang, Dengguo Feng, Xuejia Lai and Hongbo Yu found collisions for MD4, MD5, RIPEMD, and the 128-bit version of HAVAL.
		RIPEMD-160 is a strengthened version of RIPEMD with a 160-bit hash result, and is expected to be secure for the next ten years or more.
		RIPEMD-128 is a plug-in substitute for RIPEMD (or MD4 and MD5, for that matter) with a 128-bit result.
	www.esat.kuleuven.ac.be /~bosselae/ripemd160.html (1704 words)

	RIPEMD - Wikipedia, the free encyclopedia
		RIPEMD-160 (RACE Integrity Primitives Evaluation Message Digest) is a 160-bit message digest algorithm (and cryptographic hash function) developed in Europe by Hans Dobbertin, Antoon Bosselaers and Bart Preneel, and first published in 1996.
		It is an improved version of RIPEMD, which in turn was based upon the design principles used in MD4, and is similar in performance to the more popular SHA-1.
		In August 2004, a collision was reported for the original RIPEMD (PDF).
	en.wikipedia.org /wiki/RIPEMD-160 (300 words)

	RIPEMD-160
		It is an improved version of RIPEMD, which in turn was based upon the design principles used in MD4, and is similar in both strength and performance to the more popular SHA-1.
		The 128-bit version was intended only as a drop-in replacement for the original RIPEMD, which was also 128-bit, and which had been found to have questionable security.
		The 256 and 320-bit versions diminish only the chance of accidental collision, and don't have higher levels of security as compared to, respectively, RIPEMD-128 and RIPEMD-160.
	www.ebroadcast.com.au /lookup/encyclopedia/ri/RIPEMD-160.html (197 words)

	The RIPEMD-160 page
		At the rump session of Crypto 2004 it was announced that Xiaoyun Wang, Dengguo Feng, Xuejia Lai and Hongbo Yu found collisions for MD4, MD5, RIPEMD, and the 128-bit version of HAVAL.
		RIPEMD-160 is a strengthened version of RIPEMD with a 160-bit hash result, and is expected to be secure for the next ten years or more.
		RIPEMD-128 is a plug-in substitute for RIPEMD (or MD4 and MD5, for that matter) with a 128-bit result.
	homes.esat.kuleuven.be /~bosselae/ripemd160.html (1704 words)

	RIPEMD-160 - Wikipedia, la enciclopedia libre
		Es una versión mejorada de RIPEMD, que estaba basado sobre los principios del diseño del algoritmo MD4, y es similar en seguridad y funcionamiento al más popular SHA-1.
		La versión 128 bits fue pensada solamente como un reemplazo para el RIPEMD original, que eran también de 128 bits, y en la que habían sido encontradas razones para cuestionar su seguridad.
		Los hashes de 160 bits RIPEMD (también llamados resúmenes RIPE del mensaje) se representan típicamente como números en hexadecimal 40 dígitos.
	es.wikipedia.org /wiki/RIPEMD-160 (298 words)

	RIPEMD (Site not responding. Last check: 2007-09-21)
		RIPEMD is a cryptographic hash based upon MD4.
		It's been shown to have weaknesses and has been replaced by RIPEMD-128 and RIPMD-160.
		If you follow this link, you will be unable to use the site afterwards.
	wiki.tcl.tk /10919 (175 words)

	The legal and practical implications of recent attacks on 128–bit cryptographic hash functions
		The attacks on the 128–bit hash functions MD4, MD5, RIPEMD and HAVAL–128 presented at Crypto ’2004 [41] have established that it is no longer secure to use any of these four hash functions for various information processing applications where the collision resistance property is relevant.
		The attacks on MD4, MD5, RIPEMD and HAVAL-128 presented at Crypto ’2004 by Xiaoyun Wang et al show that these hash algorithms can no longer be classified as CRHFs, as collisions can be found for these algorithms with less computational complexity than required by the Birthday attack technique.
		The results of the collisions on MD4, MD5, RIPEMD and HAVAL-128 are available at [41].
	www.firstmonday.org /issues/issue11_1/gauravaram/index.html (7148 words)

	Dr. Dobb's \| The RIPEMD-160 Cryptographic Hash Function \| July 22, 2001 (Site not responding. Last check: 2007-09-21)
		These results show that a more conservative approach to the design of hash functions is required; new hash functions need more rounds and will be slower than the previous ones.
		It is a strengthened version of RIPEMD, which was developed in the framework of the EU project RIPE ("Race Integrity Primitives Evaluation, '88-'92").
		RIPEMD has only a 16-byte result, and the new attacks proposed by Dobbertin apply to a reduced version of RIPEMD.
	www.ddj.com /184410106?pgno=1 (2186 words)

	Operational Outline-Digital Signature...Encryptoo.com
		In August 2004, researchers found weaknesses in a number of hash functions, including MD5, SHA-0 and RIPEMD.
		This has called into question the long-term security of later algorithms which are derived from these hash functions.
		Neither SHA-0 nor RIPEMD are widely used since they were replaced by their strengthened versions.
	www.encryptoo.com /opds.html (727 words)

	Why byte-by-byte comparison is the safest? - Support Forum (Site not responding. Last check: 2007-09-21)
		Collisions for Hash Functions MD4, MD5, HAVAL-128 and RIPEMD - Xiaoyun Wang, Dengguo Feng, Xuejia Lai, Hongbo Yu:
		RIPEMD was developed for the RIPE project (RACE Integrrity Primitives Evalustion, 1988-1992).
		In 1995, H. Dobbertin proved that the reduced version RIPEMD with two rounds is not collision-free[4].
	support.reasonablesw.com /forums/94/ShowPost.aspx (627 words)

	RSA Security - Collisions for SHA0, MD5, HAVAL, MD4, and RIPEMD, but SHA1 Still Secure
		This bulletin is updated by "Hash Function Updates Due to Potential Weaknesses Found in SHA-1".
		Certain implementation mistakes had caused some confusion among researchers during this verification process, but correct and full MD5 collisions can and have been efficiently found.
		The audience responded to the presentation of Feng, et al with a standing ovation, and the statement that MD4 collisions could be computed "by hand" was made for dramatic effect.
	www.rsasecurity.com /rsalabs/node.asp?id=2738 (1200 words)

	RIPEMD-160: A Strengthened Version of RIPEMD - Dobbertin, Bosselaers, Preneel (ResearchIndex) (Site not responding. Last check: 2007-09-21)
		During the last five years, several fast software hash functions have been proposed; most of them are based on the design principles of Ron Rivest's MD4.
		One such proposal was RIPEMD, which was developed in the framework of the EU project RIPE (Race Integrity Primitives Evaluation).
		10 RIPEMD with two-round compress function is not collisionfree (context) - Dobbertin
	citeseer.ist.psu.edu /176505.html (519 words)

	TrueCrypt - Free Open-Source On-The-Fly Disk Encryption Software for Windows XP/2000 and Linux - Documentation
		The size of the output of RIPEMD-160 is 160 bits.
		RIPEMD-160 is a strengthened version of the RIPEMD hash algorithm which was developed in the framework of the European Union’s project RIPE (RACE Integrity Primitives Evaluation), 1988-1992, and in which collisions were found in 2004.
		No collisions have been found in RIPEMD-160 so far and no method is known to do so with effort smaller than that required for brute force on average (for information on how discovery of collisions in a hash function affects TrueCrypt, please see the section SHA-1).
	www.truecrypt.org /docs/ripemd-160.php (161 words)

	comp.os.linux.security: Re: "Collision for Hash Functions MD4, MD5, HAVAL-128 and RIPEMD"
		Re: "Collision for Hash Functions MD4, MD5, HAVAL-128 and RIPEMD"
		In reply to: Peter Pearson: "Re: "Collision for Hash Functions MD4, MD5, HAVAL-128 and RIPEMD""
		Collisions for Hash Functions MD4, MD5, HAVAL-128 and RIPEMD
	www.derkeiler.com /Newsgroups/comp.os.linux.security/2004-08/0300.html (873 words)

	PGP DH vs. RSA FAQ
		Compare this with SHA-1 & RIPEMD with which no such forethought is necessary (because no B can be found that hashes to the same M with these two alternative algorithms).
		The original RIPEMD was released in 1992 but was subsequently found to have some significant weaknesses [Dob95], [MOV96].
		The new version of RIPEMD is approximately half as fast as the previous version - which gives some idea of the significant security improvements made between versions.
	www.scramdisk.clara.net /pgpfaq.html (15220 words)

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