Eighth ACIS International Conference on Software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing (SNPD 2007) Security Analysis and Improvement of a (t, n) Threshold Proxy Signature Scheme Haier International Training Center, Qingdao, China July 30-August 01 ISBN: 0-7695-2909-7
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/SNPD.2007.301
Recently, H. Jiang proposed a (t, n) threshold proxy signature scheme based on RSA cryptosystem, in which any t or more proxy signers can cooperatively generate a proxy signature while t - 1 or less of them can?t do it. In this paper, we propose a security analysis of H. Jiang?s threshold proxy signature scheme and show that when e \ge p + q, the original signer can compute the group proxy private key d and then generate any valid proxy signature. Therefore, this scheme doesn?t satisfy the security properties of threshold proxy signatures when e \ge p + q. Fortunately, this security weakness can be easily repaired.
Citation:
Fanyu Kong, Jia Yu, Baodong Qin, Ming Li, Daxing Li, "Security Analysis and Improvement of a (t, n) Threshold Proxy Signature Scheme," snpd, vol. 3, pp.923-926, Eighth ACIS International Conference on Software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing (SNPD 2007), 2007 Usage of this product signifies your acceptance of the Terms of Use. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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