Two Improved Proxy Multi-signature Schemes Based on the Elliptic Curve Cryptosystem

论文发布时间：[2010-04-06] 范文大全编辑：Voive.net

所有作者：薛庆水李凤英曹珍富

作者单位：上海交通大学技术学院

论文摘要：In a proxy signature scheme， one original signer delegates a proxy signer to sign messages on behalf of the original signer。 In a proxy multi-signature scheme， n original signers cooperate to delegate their signing power to one proxy signer。 In ２００３， Chen， Chung and Huang proposed one proxy-protected proxy multi-signature scheme (CCH１ scheme) based on the elliptic curve cryptosystem。 Park et al。 pointed out that CCH１ scheme is insecure， however， they couldn’t provide a modified scheme or new schemes。 To resist the forgery attack from the original signer proposed by Park et al。， based on CCH１ scheme， one improved scheme is proposed。 In ２００４， Chen， Chung and Huang proposed another proxy multi-signature scheme (CCH２ scheme) also based on the elliptic curve cryptosystem。 By security analysis， Park et al。 showed that CCH２ scheme can’t resist the conspiracy attack from all original signers。 As to CCH２ scheme， Park et al。 neither provided an improved version or new version。 Based on CCH２ scheme， a modified scheme is brought forward。

关键词： Cryptography Digital signature Proxy signature Proxy multi-signature Elliptic curve cryptosystem

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