In cryptography, Khufu and Khafre are two block ciphers designed by Ralph Merkle in 1989 while working at Xerox's Palo Alto Research Center. Along with Snefru, a cryptographic hash function, the ciphers were named after the Egyptian Pharaohs Khufu, Khafre and Sneferu. Under a voluntary scheme, Xerox submitted Khufu and Khafre to the National Security Agency (NSA) prior to publication. NSA requested that Xerox not publish the algorithms, citing concerns about national security.

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dbpedia-owl:abstract
  • In cryptography, Khufu and Khafre are two block ciphers designed by Ralph Merkle in 1989 while working at Xerox's Palo Alto Research Center. Along with Snefru, a cryptographic hash function, the ciphers were named after the Egyptian Pharaohs Khufu, Khafre and Sneferu. Under a voluntary scheme, Xerox submitted Khufu and Khafre to the National Security Agency (NSA) prior to publication. NSA requested that Xerox not publish the algorithms, citing concerns about national security. Xerox, a large government contractor, complied. However, a reviewer of the paper passed a copy to John Gilmore, who made it available via the sci. crypt newsgroup. It would appear this was against Merkle's wishes. The scheme was subsequently published at the 1990 CRYPTO conference (Merkle, 1990). Khufu and Khafre were patented by Xerox; issued on March 26, 1991.
  • Khufu et Khafre sont deux algorithmes de chiffrement par bloc développés par Ralph Merkle en 1989 alors qu'il travaillait pour le compte de Xerox au centre de recherche de Palo Alto. Tout comme Snefru, une fonction de hachage cryptographique, ces chiffrements portent les noms des pharaons égyptiens Khéops (Khufu), Snéfrou (Snefru) (père de Khéops) et Khéphren (fils de Khéops). Xerox transmit volontairement Khufu et Khafre à la NSA avant de les diffuser. La NSA demanda à Xerox de ne pas publier les algorithmes pour des raisons de sécurité nationale. Xerox, travaillant souvent avec le gouvernement, accéda à cette requête. Toutefois, une des personnes chargées de relire les spécifications, John Gilmore, envoya le document sur sci. crypt contre la volonté de Merkle. L'algorithme fut de ce fait officiellement publié en 1990 à la conférence CRYPTO. Khufu et Khafre ont été brevetés par Xerox le 26 mars 1991. Les deux algorithmes ont été optimisés pour du 32 bits
  • In crittografia Khufu e Khafre sono due cifrari a blocchi sviluppati da Ralph Merkle nel 1989 durante il periodo in cui lavorava per Xerox al Palo Alto Research Center. Come Snefru, una funzione di hash, i cifrari furono denominati con i nomi dei faraoni egizi Cheope (Khufu), Chefren (Khafre) e Snefru. Prima della pubblicazione, Xerox propose volontariamente gli algoritmi Khufu e Khafre al vaglio dell'agenzia NSA, che ne bloccò la pubblicazione per motivi di sicurezza nazionale. Xerox, che aveva diversi appalti governativi, accondiscese alla richiesta. I documenti furono però copiati da un revisore, che li passò all'attivista John Gilmore, che a sua volta li distribuì sul newsgroup sci. crypt http://groups. google. com/groups?selm=7981%40hoptoad. uucp; http://groups. google. com/groups?selm=497%40lexicon. com: tutto questo avvenne contro i voleri di Merkle http://groups. google. com/groups?selm=1638%40arisia. Xerox. COM. Gli schemi furono poi resi pubblici alla conferenza CRYPTO del 1990. Khufu e Khafre sono brevettati da Xerox.
  • Khufu — в криптографии симметричный блочный криптоалгоритм, разработанный Ральфом Мерклом в 1990 году в качестве альтернативы DES, исправляющий ряд ее недостатков.
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  • 64 (xsd:integer)
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  • Gilbert and Chauvaud's differential attack
  • Biham and Shamir's differential attack is faster than brute force even for 24 rounds
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  • Khufu
  • Khafre
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  • Khafre
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  • In cryptography, Khufu and Khafre are two block ciphers designed by Ralph Merkle in 1989 while working at Xerox's Palo Alto Research Center. Along with Snefru, a cryptographic hash function, the ciphers were named after the Egyptian Pharaohs Khufu, Khafre and Sneferu. Under a voluntary scheme, Xerox submitted Khufu and Khafre to the National Security Agency (NSA) prior to publication. NSA requested that Xerox not publish the algorithms, citing concerns about national security.
  • Khufu et Khafre sont deux algorithmes de chiffrement par bloc développés par Ralph Merkle en 1989 alors qu'il travaillait pour le compte de Xerox au centre de recherche de Palo Alto. Tout comme Snefru, une fonction de hachage cryptographique, ces chiffrements portent les noms des pharaons égyptiens Khéops (Khufu), Snéfrou (Snefru) (père de Khéops) et Khéphren (fils de Khéops). Xerox transmit volontairement Khufu et Khafre à la NSA avant de les diffuser.
  • In crittografia Khufu e Khafre sono due cifrari a blocchi sviluppati da Ralph Merkle nel 1989 durante il periodo in cui lavorava per Xerox al Palo Alto Research Center. Come Snefru, una funzione di hash, i cifrari furono denominati con i nomi dei faraoni egizi Cheope (Khufu), Chefren (Khafre) e Snefru. Prima della pubblicazione, Xerox propose volontariamente gli algoritmi Khufu e Khafre al vaglio dell'agenzia NSA, che ne bloccò la pubblicazione per motivi di sicurezza nazionale.
  • Khufu — в криптографии симметричный блочный криптоалгоритм, разработанный Ральфом Мерклом в 1990 году в качестве альтернативы DES, исправляющий ряд ее недостатков.
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  • Khufu and Khafre
  • Khufu et Khafre
  • Khufu e Khafre
  • Khufu
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