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Erschienen in:
2006 | OriginalPaper | Buchkapitel
Cryptanalysis of Rainbow
verfasst von : Olivier Billet, Henri Gilbert
Erschienen in: Security and Cryptography for Networks
Verlag: Springer Berlin Heidelberg
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Rainbow is a fast asymmetric multivariate signature algorithm proposed by J. Ding and D. Schmidt in [5]. This paper presents a cryptanalysis of Rainbow which enables an attacker provided with the public key to recover an equivalent representation of the secret key, thus allowing her to efficiently forge a signature of any message. For the set of parameter values recommended by the authors of Rainbow in order to achieve a security level strictly higher than 2
80
, the complexity of our attack is less than 2
71
operations. This is 2
40
times less than the complexity of the best known attack used by the authors to dimension their system.