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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/27793

Title: Efficient nonrepudiable threshold proxy signature scheme with known signers against the collusion attack
Authors: Chien-Lung Hsu;Tzong-Sun Wu
Contributors: NTOU:Department of Computer Science and Engineering
Keywords: Digital signature;Proxy signature;Threshold proxy signature;Collusion attack
Date: 2005-09-01
Issue Date: 2011-10-21T02:34:02Z
Publisher: Applied Mathematics and Computation
Abstract: Abstract:In 1999, Sun proposed a nonrepudiable (t, n) threshold proxy signature scheme with known signers. Latter, Hwang et al. pointed out Sun’s scheme is vulnerable to the so-called collusion attack that (n - 1) malicious proxy signers in the proxy group could conspire to impersonate the remainder one. Hwang et al. further proposed an improvement to withstand such an attack. In this paper, however, we will show that Hwang et al.’s improvement is still vulnerable to their proposed collusion attack and unable to achieve the nonrepudiation requirement as they claimed. Finally, we proposed a new efficient nonrepudiable threshold proxy signature scheme not only to eliminate the security leaks but also to be more efficient than Hwang et al.’s scheme in terms of computational complexities and communication costs.
Relation: 168(1), pp.305–319
URI: http://ntour.ntou.edu.tw/handle/987654321/27793
Appears in Collections:[資訊工程學系] 期刊論文

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