Snefru is a cryptographic hash function invented by Ralph Merkle which supports 128-bit and 256-bit output. It was named after the Egyptian Pharaoh Sneferu, continuing the tradition of the Khufu and Khafre block ciphers. In cryptography, a cryptographic hash function is a hash function with certain additional security properties to make it suitable for use as a primitive in various information security applications, such as authentication and message integrity. ... Ralph C. Merkle (born 2 February 1952) is a pioneer in public key cryptography, and more recently a researcher and speaker on molecular nanotechnology and cryonics. ... Pharaoh (Hebrew פַּרְעֹה (without niqqud: פרעה), Standard Hebrew Parʿo, Tiberian Hebrew Parʿōh, Arabic فرعون) is a title used to refer to the kings (of godly status) in ancient Egypt. ... Sneferu, Egyptian Museum The Red Pyramid of Sneferu Sneferu, also spelt as Snefru or Snofru (in Greek known as Soris), was the founder of the Fourth dynasty of Egypt, reigning from around 2613 BC to 2589 BC. The father of Egypts most famous pyramid builder, Khufu, Sneferu was actually... In cryptography, Khufu and Khafre are two block ciphers designed by Ralph Merkle in 1989 while working at Xeroxs Palo Alto Research Center. ... In cryptography, Khufu and Khafre are two block ciphers designed by Ralph Merkle in 1989 while working at Xeroxs Palo Alto Research Center. ... In cryptography, a block cipher is a symmetric key cipher which operates on fixed-length groups of bits, termed blocks, with an unvarying transformation. ...

The original design of Snefru was shown to be insecure by Eli Biham and Adi Shamir who were able to use differential cryptanalysis to find hash collisions. The design was then modified by increasing the number of iterations of the main pass of the algorithm from two to eight. Although differential cryptanalysis can break the revised version with less complexity than brute force search (a certificational weakness), the attack requires 2^88.5 operations and is thus not currently feasible in practice. Eli Biham is an Israeli cryptographer and cryptanalyst, currently a professor at the Technion Israeli Institute of Technology Computer Science department. ... Adi Shamir at the CRYPTO 2003 conference. ... Differential cryptanalysis is a general form of cryptanalysis applicable primarily to block ciphers, but also to stream ciphers and cryptographic hash functions. ... The EFFs US$250,000 DES cracking machine contained over 18,000 custom chips and could brute force a DES key in a matter of days — the photograph shows a DES Cracker circuit board fitted with several Deep Crack chips In cryptanalysis, a brute force attack is a method...

External Links

• CryptoDox - Snefru

See also: Topics in cryptography, MD5, SHA. ... MD5 was designed by Ronald Rivest (one of the inventors of the RSA algorithm) in 1991. ... Sha (Ш, ш) is a letter of the Cyrillic alphabet, representing the consonant sound /ʃ/ or /ʃʲ/. This is equivalent to sh in English, ch in French, sch in German, ş in Turkish, or sz in Polish. ...