Improvement on Li et al.'s generalization of proxy signature schemes

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Title:	Improvement on Li et al.'s generalization of proxy signature schemes
Authors:	黃心嘉;Hwang, Shin-jia;詹景中;Chan, Ching-chung
Contributors:	淡江大學資訊工程學系
Keywords:	Proxy signatures scheme;Proxy threshold signature scheme;Multi-proxy signature scheme;Proxy multi-signature scheme;Multi-proxy multi-signature scheme;Digital signature scheme
Date:	2004-10-01
Issue Date:	2010-03-26 19:12:38 (UTC+8)
Publisher:	Elsevier
Abstract:	Recently, Li et al. proposed their generalization of proxy signature schemes. However, all of Li et al.'s schemes have a common security weakness. In Li et al.'s schemes, an adversary first intercepts a valid proxy signature generated by a proxy group on behalf of the proxy group GP. From the intercepted proxy signature, the adversary can forge illegal proxy signatures being likely generated by the proxy group on behalf of an adversary. To overcome this weakness, our improvement is also proposed.
Relation:	Computers & Security 23(7), pp.614-619
DOI:	10.1016/j.cose.2004.06.003
Appears in Collections:	[Graduate Institute & Department of Computer Science and Information Engineering] Journal Article

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