Paper 2003/111

Further Cryptanalysis of some Proxy Signature Schemes

Jiqiang Lv, Jingwei Liu, and Xinmei Wang

Abstract

Proxy signature is a signature that an original signer delegates his or her signing capability to a proxy signer, and then the proxy signer creates a signature on behalf of the original signer. However, Sun et al.[7] showed that the proxy and multi-proxy signatures of Lee et al.[3], and the strong proxy signature scheme with proxy signer privacy protection of Shum et al.[6] are not against the original signer's forgery attack, so these schemes do not process the property of unforgeability. In this paper, we present an extensive forgery method on these schemes, which makes the forgery method of Sun et al.be a special case of ours.

Note: revise a paper

Metadata
Available format(s)
-- withdrawn --
Publication info
Published elsewhere. Unknown where it was published
Keywords
Public Key CryptographyProxy Digital SignatureForgery Attack
Contact author(s)
lvjiqiang @ hotmail com
History
2006-01-07: withdrawn
2003-06-03: received
See all versions
Short URL
https://ia.cr/2003/111
License
Creative Commons Attribution
CC BY
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