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Encyclopedia > Noekeon

Noekeon is a block cipher with a block and key length of 128 bits. It is an iterated cipher consisting of the repeated application of a simple round transformation, followed by an output transformation. The round transformation includes XORing a Working Key to the intermediate result. In cryptography, a block cipher is a symmetric key cipher which operates on fixed-length groups of bits, termed blocks, with an unvarying transformation. ... Exclusive disjunction (usual symbol xor) is a logical operator that results in true if one of the operands (not both) is true. ...


Noekeon shows resistance against cryptanalysis. It is expected to behave as good as can be expected from a block cipher with the given block and key length. An extensive study of 4-round linear and differential trails was conducted, which shows that Noekeon is resistant against both differential cryptanalysis and linear cryptanalysis. 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. ... Differential cryptanalysis is a general form of cryptanalysis applicable primarily to block ciphers, but also to stream ciphers and cryptographic hash functions. ... In cryptography, linear cryptanalysis is a general form of cryptanalysis based on finding affine approximations to the action of a cipher. ...


Thanks to its design simplicity, symmetry and simplicity of description, it is fast on a wide range of platforms and can be implemented using a compact code or circuit compactness.


Furthermore, resistance against implementation attacks was taken into account in the design of Noekeon. It is able to have implementations that are resistant against attacks such as timing attacks and differential power analysis.


External links

  • The Noekeon Page


Block ciphers edit
Algorithms: 3-Way | AES | Akelarre | Blowfish | Camellia | CAST-128 | CAST-256 | CMEA | CS-Cipher | DEAL | DES | DES-X | FEAL | FOX | FROG | G-DES | GOST | ICE | IDEA | Iraqi | KASUMI | KHAZAD | Khufu and Khafre | LOKI89/91 | LOKI97 | Lucifer | MacGuffin | Madryga | MAGENTA | MARS | MISTY1 | MMB | NewDES | Noekeon | RC2 | RC5 | RC6 | REDOC | Red Pike | S-1 | SAFER | SEED | Serpent | SHACAL | SHARK | Skipjack | Square | TEA | Triple DES | Twofish | XTEA
Design: Feistel network | Key schedule | Product cipher | S-box | SPN   Attacks: Brute force | Linear / Differential cryptanalysis | Mod n Related key | XSL   Standardisation: AES process | CRYPTREC | NESSIE   Misc: Avalanche effect | Block size | IV | Key size | Modes of operation | Piling-up lemma | Weak key

  Results from FactBites:
 
NOEKEON - Wikipedia, the free encyclopedia (190 words)
NOEKEON (IPA: /ˈnukiɔn/) is a family of two block ciphers designed by Joan Daemen, Michaël Peeters, Gilles Van Assche and Vincent Rijmen and submitted to the NESSIE project in September 2000.
The two ciphers are "direct mode" NOEKEON, to be used for maximum efficiency where related-key attacks are not possible, and "indirect mode" NOEKEON where they are.
Each round of NOEKEON employs a sequence of self-inverse transformations which can be implemented easily in hardware or software, even where differential power analysis is a concern.
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