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Cryptanalysis of Tzeng-Tzeng Forward-Secure Signature Schemes
Hong WANG Gang QIU Deng-Guo FENG Guo-Zhen XIAO
Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Vol.E89-A
No.3
pp.822-825 Publication Date: 2006/03/01 Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e89-a.3.822 Print ISSN: 0916-8508 Type of Manuscript: LETTER Category: Information Security Keyword: threshold cryptography, signature, cryptanalysis, forward-secure, secure multiparty computation,
Full Text: PDF(86.7KB)>>
Summary:
In PKC'01, Tzeng et al. proposed two robust forward-secure signature schemes with proactive security: one is an efficient scheme, but it requires a manager; the other scheme is a new construction based on distributed multiplication procedures. In this paper, we point out their new distributed multiplication procedure is not secure, thus making the whole new construction insecure. Finally, we present an improved forward-secure signature scheme without a manager.
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