RIPEMD

RIPEMD

RIPEMD-160 (RACE Integrity Primitives Evaluation Message Digest) is a 160-bit message digest algorithm (and cryptographic hash function) developed in Leuven (Belgium) by Hans Dobbertin, Antoon Bosselaers and Bart Preneel at the COSIC research group at the Katholieke Universiteit Leuven, 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.

There also exist 128, 256 and 320-bit versions of this algorithm, called RIPEMD-128, RIPEMD-256, and RIPEMD-320, respectively. 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.

RIPEMD-160 was designed in the open academic community, in contrast to, e.g., the NSA-designed family of algorithms, SHA. On the other hand, RIPEMD-160 appears to be used somewhat less frequently than SHA-1, which may have caused it to be less scrutinised than SHA-1.

RIPEMD-160 is not known to be constrained by any patents.

In August 2004, a collision was reported for the original RIPEMD [http://eprint.iacr.org/2004/199.pdf (PDF)] . This does not apply to RIPEMD-160.

RIPEMD-160 hashes

The 160-bit RIPEMD-160 hashes (also termed RIPE "message digests") are typically represented as 40-digit hexadecimal numbers. The following demonstrates a 43-byte ASCII input and the corresponding RIPEMD-160 hash:

RIPEMD-160("The quick brown fox jumps over the lazy dog") = 37f332f68db77bd9d7edd4969571ad671cf9dd3b

Even a small change in the message will (with overwhelming probability) result in a completely different hash, e.g. changing d to c:

RIPEMD-160("The quick brown fox jumps over the lazy cog") = 132072df690933835eb8b6ad0b77e7b6f14acad7

The hash of a zero-length string is:

RIPEMD-160("") = 9c1185a5c5e9fc54612808977ee8f548b2258d31

ee also

* Topics in cryptography

External links

* [http://www.infosec.sdu.edu.cn/paper/md4-ripemd-attck.pdf An attack on the original MD4-based RIPEMD]
* [http://www.esat.kuleuven.ac.be/~bosselae/ripemd160.html RIPEMD-160: A Strengthened Version of RIPEMD] (RIPEMD-160 specification and reference implementation)
* [http://www.hashemall.com Hash'em all!] — free online text and file hashing with different algorithms (including RIPEMD)


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  • RIPEMD-160 — Saltar a navegación, búsqueda RIPEMD 160 (acrónimo de RACE Integrity Primitives Evaluation Message Digest, primitivas de integridad del resumen del mensaje) es un algoritmo del resumen del mensaje de 160 bits (y función criptográfica de hash)… …   Wikipedia Español

  • RIPEMD-256 — RIPEMD 256  хэш функция разработанная Хансом Доббертином, Антоном Боселаерсом и Бартом Принилом в 1996 году. Размер хэша  256 бит. Размер блока входных данных  512 бит. RIPEMD 256 является развитием RIPEMD 128 и предназначен для… …   Википедия

  • RIPEMD-320 — RIPEMD 320  хэш функция разработанная Хансом Доббертином, Антоном Боселаерсом и Бартом Принилом в 1996 году. Размер хэша  320 бит. Размер блока входных данных  512 бит. Уязвимостей на текущий момент не обнаружено. RIPEMD 320… …   Википедия

  • Ripemd-160 — L algorithme de hachage RIPEMD 160, pour RACE Integrity Primitives Evaluation Message Digest, est une fonction de hachage qui génère une signature de 160 bits. Elle a été développée en Europe par Hans Dobbertin, Antoon Bosselaers et Bart Preneel …   Wikipédia en Français

  • RIPEMD-160 — (RACE Integrity Primitives Evaluation Message Digest) ist eine kryptographische Hashfunktion mit einer Ausgabe von 160 Bits. RIPEMD 160 wurde von Hans Dobbertin, Antoon Bosselaers und Bart Preneel in Europa entwickelt und 1996 erstmals publiziert …   Deutsch Wikipedia

  • Ripemd-128 — L algorithme de hachage RIPEMD 128, pour RACE Integrity Primitives Evaluation Message Digest, est une fonction de hachage qui produit une signature de 128 bits. Elle a été développée en Europe par Hans Dobbertin, Antoon Bosselaers et Bart Preneel …   Wikipédia en Français

  • Ripemd-256 — L algorithme de hachage RIPEMD 256, pour RACE Integrity Primitives Evaluation Message Digest, est une fonction de hachage qui produit une signature de 256 bits. Elle a été développée en Europe par le RIPE Consortium. Voir aussi SHA 1 RIPEMD 128… …   Wikipédia en Français

  • RIPEMD-160 — (acrónimo de RACE Integrity Primitives Evaluation Message Digest, primitivas de integridad del resumen del mensaje) es un algoritmo del resumen del mensaje de 160 bits (y función criptográfica de hash) desarrollado en Europa por Hans Dobbertin,… …   Enciclopedia Universal

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