Practical anonymous proxy signature schemes

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Title:	Practical anonymous proxy signature schemes
Other Titles:	實用的匿名代理簽章
Authors:	徐碧鴻;Hsu, Pi-hung
Contributors:	淡江大學資訊工程學系碩士在職專班黃心嘉;Hwang, Shin-jia
Keywords:	匿名性;代理簽章;保護代理簽章;同時簽章法;Anonymity;proxy protection;proxy signatures;Concurrent Signatures
Date:	2008
Issue Date:	2010-01-11 05:53:31 (UTC+8)
Abstract:	代理簽章的架構主要是由原始簽章者授權給代理簽章者，代替原始簽章者去簽署文件；於現實世界中，衍生保護代理簽章者的需求，因此匿名的代理簽章架構主要是為了保護代理簽章者的隱私權而產生。最早的代理簽章觀念，於1996年由日本學者所提出，陸續有許多相關的論文相繼產生。於2002年，Sum 及Wei提出了一套實用的代理簽章架構，採用匿名憑證中心的觀念，核發匿名憑證給代理簽章者，但該架構被證實並沒有符合不可偽造的特性。因此，我們期望可以發展出一套的匿名代理簽章架構，符合匿名簽章應包含的特性及實用性。為了達成該需求，將導入同時簽章法(Concurrent signatures)的特性於匿名簽章申請階段，並證明該架構的安全性。 Proxy signature schemes with anonymous proxy signers are called anonymous proxy signature schemes. Anonymous proxy signature schemes are used to protect proxy signers’ privacy. Among the proposed anonymous proxy signature schemes, Sum and Wei’s scheme is more practical than the other proposed scheme. However, their scheme does not satisfy strong unforgeability. Here, a new practical anonymous proxy signature scheme is first proposed with the help of concurrent signature schemes. In the new scheme, the anonymous names of proxy signers keep secret before use to protect proxy signers’ privacy.
Appears in Collections:	[Graduate Institute & Department of Computer Science and Information Engineering] Thesis

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