Improvement on Hwang et al.'s generalization of proxy signature schemes based on elliptic curves

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Title:	Improvement on Hwang et al.'s generalization of proxy signature schemes based on elliptic curves
Authors:	黃心嘉;Hwang, Shin-jia;Huang, Chia-wei
Contributors:	淡江大學資訊工程學系
Keywords:	Proxy signature schemes;Proxy threshold signature schemes;Multi-proxy signature schemes;Proxy multi-signature schemes;Multi-proxy multi-signature schemes;Digital signature schemes;Elliptic curve cryptography
Date:	2005-11-15
Issue Date:	2010-03-26 19:28:39 (UTC+8)
Publisher:	Elsevier
Abstract:	Hwang et al. proposed their generalization of proxy signature schemes based on elliptic curves. However, two attacks are proposed to show that their schemes have serious security flaws. By the first attack, an adversary can forge an illegal proxy signature that verifiers cannot actually find out the original signers of proxy signatures. The second attack is used to change proxy signatures into multi-signatures belonging to the group that actually generates the proxy signatures. To overcome these flaws, our improvement on Hwang et al.’s scheme is also proposed.
Relation:	Applied Mathematics and Computation 170(2), pp.941-947
DOI:	10.1016/j.amc.2004.12.036
Appears in Collections:	[Graduate Institute & Department of Computer Science and Information Engineering] Journal Article

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