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COMPSEC
2004

An improvement of nonrepudiable threshold proxy signature scheme with known signers

11 years 9 months ago
An improvement of nonrepudiable threshold proxy signature scheme with known signers
In a (t, n) threshold proxy signature scheme, which is a variant of the proxy signature scheme, the proxy signature key is shared among a group of n proxy signers delegated by the original signer. Any t or more proxy signers can cooperatively sign messages on behalf of the original signer. In 2000, Hwang et al. (Int J Inf 11 (2000) 1) proposed a secure nonrepudiable threshold proxy signature scheme with known signers. In this paper, we point out a cryptanalysis of their scheme. Furthermore, we improve the security of the threshold proxy signature scheme which remedies the weakness of Hwang et al.'s scheme.
Shiang-Feng Tzeng, Min-Shiang Hwang, Cheng-Ying Ya
Added 17 Dec 2010
Updated 17 Dec 2010
Type Journal
Year 2004
Where COMPSEC
Authors Shiang-Feng Tzeng, Min-Shiang Hwang, Cheng-Ying Yang
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