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On Parallel Hash Functions Based on Block-Ciphers

Toshihiko MATSUO, Kaoru KUROSAWA

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Summary :

In this paper, we study variants of the parallel hash function construction of Damgård. We first show an improvement such that the number of processors is almost a half if |M|=(2s + 1)n for some s, where M is the message to be hashed. We next show that there exists a variant of our parallel hash construction such that it is secure even if the underlying compression function is not necessarily collision-free nor one-way. The cost is that some constant times more processors are required.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E87-A No.1 pp.67-74
Publication Date
2004/01/01
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Section on Cryptography and Information Security)
Category
Symmetric Cipher

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