Attack on Yagisawa Cryptosystem

Kaoru KUROSAWA  Takashi SATOH  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E80-A   No.1   pp.107-108
Publication Date: 1997/01/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Yagisawa cryptosystem,  Kannan's algorithm,  

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Recently, Yagisawa proposed a public key cryptosystem which is very similar to the modified Lu-Lee cryptosystem. The differences are the set of messages and the decryption. On the other hand, Brickell and Odlyzko showed that the modified Lu-Lee cryptosystem is completely broken in polynomial time. This paper shows that Yagisawa cryptosystem is completely broken in the same way.