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INFORMATICALT
2007

On the Proxy-Protected Property of Chen et al.'s Proxy Multisignature Schemes

9 years 3 months ago
On the Proxy-Protected Property of Chen et al.'s Proxy Multisignature Schemes
Recently, Chen, Chung, and Huang proposed a traceable proxy multisignature scheme based on the elliptic curve cryptosystem. However, this paper shows that the original signers can produce a valid signature as the proxy signer does in the proxy protected scheme. Therefore, Chen et al.’s proxy-protected scheme cannot protect the proxy signer from being forged by the original signers. We further find that the early work of Chen et al. in 2003 suffers the same attack. To overcome this problem, an improved scheme will be presented. Key words: proxy signature, proxy multisignature, proxy-protected, elliptic curve, digital signature.
Pei-Hui Huang, Hsiang-An Wen, Chih-Hung Wang, Tzon
Added 15 Dec 2010
Updated 15 Dec 2010
Type Journal
Year 2007
Where INFORMATICALT
Authors Pei-Hui Huang, Hsiang-An Wen, Chih-Hung Wang, Tzonelih Hwang
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