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題 名 | A Threshold Signature Scheme Withstanding the Conspiracy Attack |
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作 者 | 詹進科; 曾育民; 簡宏宇; | 書刊名 | 中華民國資訊學會通訊 |
卷 期 | 2:3 1999.09[民88.09] |
頁 次 | 頁31-37 |
分類號 | 312.76 |
關鍵詞 | 密碼學; Cryptography; Threshold signature; Group-oriented cryptography; Conspiracy attack; |
語 文 | 英文(English) |
英文摘要 | A (t,n) threshold signature, first proposed by Desmedt and Frankel, allows / or moremembers of the group cooperate to generate a signature on behalf of the group while providing theanonymity of the signers. Unfortunately, all (t,n) threshold signature schemes proposed so far cannot withstand the conspiracy attack, thus the group secret key can be revealed. In this paper, wepropose a new (t, n) threshold signature scheme to avoid the conspiracy attack. The security of theproposed threshold signature scheme is based on the difficulty of computing the discrete logarithmmodulo for a composite number. The size of the group signature and the verification time of thegroup signature are equivalent to that of an individual signature. |
本系統中英文摘要資訊取自各篇刊載內容。