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Paper 2011/419

On the security of a certificateless short signature scheme

Miaomiao Tian and Liusheng Huang and Wei Yang

Abstract

Certificateless public key cryptography is an attractive paradigm for public key cryptography since it does not require certificates in traditional public key cryptography and, at the same time, solves the inherent key escrow problem in identity-based cryptography. Currently, certificateless short signature is receiving significant attention as it is particularly useful in low-bandwidth communication environments. However, most of the certificateless short signature schemes only support low-level security. Recently, Choi et al. presented a certificateless short signature scheme and claimed that it is provably secure against the super adversaries. Nevertheless, in this paper, we show that their scheme is insecure even against a strong Type I adversary. We also propose a new certificateless short signature scheme which is more efficient and more secure than Choi et al.'s scheme.

Metadata
Available format(s)
-- withdrawn --
Publication info
Published elsewhere. Unknown where it was published
Keywords
CryptanalysisCertificateless cryptographyShort signatureBilinear pairing
Contact author(s)
miaotian @ mail ustc edu cn
History
2012-03-21: withdrawn
2011-08-05: received
See all versions
Short URL
https://ia.cr/2011/419
License
Creative Commons Attribution
CC BY
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