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Paper 2004/280

Cryptanalysis of Park-Lee Nominative Proxy Signature Scheme

Zhengjun Cao

Abstract

Park and Lee have proposed a digital nominative proxy signature scheme for mobile communication in [1]. They claimed that neither Origin signer nor Proxy agent can generate a valid signature solely. In this paper we show that Origin signer can generate a valid signature without the cooperation of the agent. In fact, the flaw comes from that Verifier dose not use the public key of Proxy agent in verifying phase. It's a serious designing error.

Metadata
Available format(s)
PDF PS
Category
Cryptographic protocols
Publication info
Published elsewhere. Unknown where it was published
Contact author(s)
zjcamss @ hotmail com
History
2004-10-30: received
Short URL
https://ia.cr/2004/280
License
Creative Commons Attribution
CC BY
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