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Paper 2011/379

Cryptanalysis and improvement of a certificateless multi-proxy signature scheme

Miaomiao Tian and Wei Yang and Liusheng Huang

Abstract

Multi-proxy signature allows an original signer authorizing a proxy group as his proxy agent and only the cooperation of all proxy signers in the group can create a proxy signature on behalf of the original signer. Recently, Jin and Wen defined a formal model of certificateless multi-proxy signature and proposed a concrete scheme. They claimed that their scheme is provably secure in their security model. Unfortunately, by giving concrete attacks, we show that Jin-Wen's certificateless multi-proxy signature scheme is not secure according to their security model. Possible improvements of their scheme are also suggested to prevent these attacks.

Metadata
Available format(s)
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Publication info
Published elsewhere. Unknown where it was published
Keywords
Certificateless cryptographyMulti-proxy signatureBilinear pairingCryptanalysis
Contact author(s)
miaotian @ mail ustc edu cn
History
2015-01-22: withdrawn
2011-07-12: received
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Short URL
https://ia.cr/2011/379
License
Creative Commons Attribution
CC BY
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