Bart Preneel is a Belgian cryptographer and cryptanalyst. He is a professor at Katholieke Universiteit Leuven, in the COSIC group, vice president of the International Association for Cryptologic Research, and project manager of ECRYPT. Pre-19th century Leone Battista Alberti, polymath/universal genius, inventor of polyalphabetic substitution (see frequency analysis for the significance of this -- missed by most for a long time and dumbed down in the Vigenère cipher), and what may have been the first mechanical encryption aid. ... Cryptanalysis (from the Greek kryptós, hidden, and analýein, to loosen or to untie) is the study of methods for obtaining the meaning of encrypted information without access to the secret information which is normally required to do so. ... The Katholieke Universiteit Leuven (Catholic University of Leuven in English - also the translated name of its French-speaking sister university) or K.U. Leuven is a Flemish university, located in the town of Leuven in Flanders, the Dutch-speaking (northern) region of Belgium. ... To meet Wikipedias quality standards, this article may require cleanup. ... The International Association for Cryptologic Research (IACR) is a non-profit scientific organization whose purpose is to further research in cryptology and related fields. ... ECRYPT (European Network of Excellence for Cryptology) is a 4-year European research initiative launched on 1 February 2004. ...

Simultaneously with Shoji Miyaguchi, he invented the Miyaguchi-Preneel scheme, a robust structure used in hash functions such as Whirlpool. He is one of the authors of the RIPEMD-160 hash function. He was also a co-inventor of the stream cipher MUGI which later on went on to become a Japanese standard, and of the stream cipher Trivium which is a well-received entrant to the eSTREAM project. In cryptography, a one-way compression function is a function that transforms two fixed length inputs to an output of the same size as one of the inputs. ... WHIRLPOOL is a cryptographic one-way hash function designed by Vincent Rijmen and Paulo S. L. M. Barreto. ... 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. ... The operation of A5/1, a LFSR-based stream cipher used to encrypt mobile phone conversations. ... In cryptography, MUGI is a pseudorandom number generator (PRNG) designed for use as a stream cipher. ... Structure of Trivium For other uses, see trivia (disambiguation). ... eSTREAM is a project to identify new stream ciphers that might become suitable for widespread adoption, organised by the EU ECRYPT network. ...

He has also contributed to the cryptanalysis of RC4, SOBER-t32, MacGuffin, Helix, Phelix, Py, the HAVAL cryptographic hash function and the SecurID hash function, among others. In cryptography, RC4 (also known as ARC4 or ARCFOUR) is the most widely-used software stream cipher and is used in popular protocols such as Secure Sockets Layer (SSL) (to protect Internet traffic) and WEP (to secure wireless networks). ... In cryptography, SOBER is a family of stream ciphers initially designed by Greg Rose of QUALCOMM Australia starting in 1997. ... In cryptography, MacGuffin is a block cipher created in 1994 by Bruce Schneier and Matt Blaze at a Fast Software Encryption workshop. ... Phelix is a high-speed stream cipher with a built-in single-pass message authentication code (MAC) functionality, submitted in 2004 to the eSTREAM contest by Doug Whiting, Bruce Schneier, Stefan Lucks, and Frédéric Muller. ... Phelix is a high-speed stream cipher with a built-in single-pass message authentication code (MAC) functionality, submitted in 2004 to the eSTREAM contest by Doug Whiting, Bruce Schneier, Stefan Lucks, and Frédéric Muller. ... Py is a stream cipher submitted to eSTREAM by Eli Biham and Jennifer Seberry. ... HAVAL is a variable-length cryptographic hash function. ... 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. ... RSA SecurID tokens SecurID is a mechanism developed by Security Dynamics and currently owned by RSA Security for authenticating a user to a network resource. ...

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