In cryptography, CryptMT is a stream cipher algorithm which internally uses the Mersenne twister. It was developed by Makoto Matsumoto, Mariko Hagita, Takuji Nishimura and Mutsuo Saito and is patented. It was one of the final Phase 3 candidates[1] in the eSTREAM project of the eCRYPT network but was not selected because the non-linear filter component was not as well-understood in terms of its security.[2]

In that submission to eSTREAM, the authors also included another cipher named Fubuki, which also uses the Mersenne twister.

References

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  1. ^ "eSTREAM Phase 3 Candidates". The eSTREAM Project. ECRYPT. Retrieved 2024-06-11.
  2. ^ "eThe eSTREAM Portfolio" (PDF). The eSTREAM Project. ECRYPT. Retrieved 2024-06-11.
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Mersenne Twister

not cryptographically secure, unless the TinyMT and CryptMT variants are used respectively. CryptMT is used over the Mersenne Twister because after observing

Makoto Matsumoto (mathematician)

widely used pseudorandom number generator. He is also the author of the CryptMT stream cipher. In Jan 1998, while an associate professor at Keio University

Stream cipher

lengths L ≤ 244. Correlation attack for L ≥ 248. 280 resp. 2128 for L ≤ 244. CryptMT 2005 ? Variable up to 19968 19968 —N/a (2008) —N/a (2008) Crypto-1 Pre-1994

ESTREAM

Phase 3 started in April 2007. Candidates for Profile 1 (software) were: CryptMT (version 3) Dragon HC (HC-128 and HC-256) LEX (LEX-128, LEX-192 and LEX-256)