两类无证书聚合签名方案的分析与改进

doi:10.6040/j.issn.1671-9352.0.2016.026

Abstract

Abstract: According to the existing certificateless aggregate signature schemes presented based on bilinear pairings, lots of them have the security flaws and low computational efficiency problem. The security of two certificateless aggregate signature schemes proposed was analyzed, and it is found that the verify equation in the first scheme is not right and the two schemes can not resist forgery attack under TypeⅡ. Finally, an improved scheme based on RSA without bilinear pairing was proposed in this paper. Based on the RSA assumption and the DL problem, it is proved that the new scheme is existentially unforgeable. Compared with other schemes, the new scheme is more efficient and secure.

Key words: aggregate signature, bilinear pairing, certificateless cryptography, RSA assumption

CLC Number:

TP309

References

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