IDEA NXT (FOX) 
 Round function for NXT128   General  Designer(s)  Pascal Junod, Serge Vaudenay  First published  2003  Derived from  IDEA  Cipher(s) based on this design  None  Algorithm detail  Block size(s)  64, 128 bits  Key size(s)  0256 bits  Structure  LaiMassey scheme  Number of rounds  12  Best cryptanalysis  Integral attack on 7 round FOX64 with time complexity of 2^{237.4} and on 5 round FOX128 with time complexity of 2^{205.6} by Wu Wenling, Zhang Wentao, and Feng Dengguo.  In cryptography, the FOX (now called IDEA NXT) algorithm is a block cipher designed by Pascal Junod and Serge Vaudenay of EPFL (Lausanne, Switzerland). It was conceived between 2001 and 2003, the project was originally named FOX and was published in 2003. In May 2005 it was announced by MediaCrypt under the name IDEA NXT. IDEA NXT is the successor of the IDEA algorithm and it uses an extended LaiMassey scheme known for its robustness to cryptanalysis. It was mandated by MediaCrypt, a Swiss company owner of the distribution rights on IDEA and the patents of IDEA NXT. The IDEA NXT cipher is a family of different subciphers with various blocks and keys size : Standard NXT64 (block of 64 bits, key of 128 bits, 12 rounds) and Standard NXT128 (block of 128 bits, key of 256 bits, 12 rounds). Variations of the Standard versions can be built (key of 0256 bits, round numbers from 2255). Also individual tables (sbox, permutation matrix) can be loaded, replacing the Standard table. Image File history File links Round function in the FOX cipher. ...
Serge Vaudenay (1968) is a wellknown French cryptographer. ...
2003 (MMIII) is a common year starting on Wednesday of the Gregorian calendar. ...
In cryptography, the International Data Encryption Algorithm (IDEA) is a block cipher designed by Xuejia Lai and James L. Massey of ETHZürich and was first described in 1991. ...
In modern cryptography, symmetric key ciphers are generally divided into stream ciphers and block ciphers. ...
In cryptography, the key size (alternatively key length) is a measure of the number of possible keys which can be used in a cipher. ...
Cryptanalysis (from the Greek kryptÃ³s, hidden, and analÃ½ein, 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. ...
Cryptography  Wikipedia, the free encyclopedia /**/ @import /skins1. ...
In cryptography, a block cipher is a symmetric key cipher which operates on fixedlength groups of bits, termed blocks, with an unvarying transformation. ...
Serge Vaudenay (1968) is a wellknown French cryptographer. ...
The Monster Clothespin from Outer Space, and entrance of the EPFL The École Polytechnique Fédérale de Lausanne (EPFL) is the Swiss Federal Institute of Technology in Lausanne in Switzerland. ...
Location within Switzerland Lausanne (46Â° 31â€² 10â€³ N, 6Â° 37â€² 56â€³ E) is a city in the Frenchspeaking part of Switzerland, situated on the shores of Lake Geneva (French: Lac LÃ©man), and facing Ã‰vianlesBains (France). ...
In cryptography, the International Data Encryption Algorithm (IDEA) is a block cipher designed by Xuejia Lai and James L. Massey of ETHZürich and was first described in 1991. ...
This cipher and its key management are patented. It is now sold by MediaCrypt under the name of IDEA NXT. A patent is a set of exclusive rights granted by a state to a person for a fixed period of time in exchange for the regulated, public disclosure of certain details of a device, method, process or composition of matter (substance) (known as an invention) which is new, inventive and...
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