A digital signature scheme secure against adaptive chosen-message attacks
SIAM Journal on Computing - Special issue on cryptography
A Digital Nominative Proxy Signature Scheme for Mobile Communication
ICICS '01 Proceedings of the Third International Conference on Information and Communications Security
Short Signatures from the Weil Pairing
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Proxy Signature Scheme Secure against Chosen Key and Chosen Warrant Attacks
NSWCTC '10 Proceedings of the 2010 Second International Conference on Networks Security, Wireless Communications and Trusted Computing - Volume 01
Certificateless Proxy Signature and Its Extension to Blind Signature
NSS '10 Proceedings of the 2010 Fourth International Conference on Network and System Security
An efficient certificateless signature scheme
EUC'06 Proceedings of the 2006 international conference on Emerging Directions in Embedded and Ubiquitous Computing
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Unforgeabilty is a primitive property of a secure digital signature. As two extensions of digital signature, proxy signature and certificateles blind signature play an important role in the sensitive transmission. In this work, we analyze the security of two signature schemes, one is the certificateless proxy blind signature scheme[6] which was proposed by Tso et al in NSS2010, the other is an efficient proxy signature scheme[8] which was proposed by Hu et al in NSWCTC 2010. Then, we show that the two schemes were insecure, meanwhile, we also show that Tso et al's basic certificateless proxy signature is insecure. In Tso et al's scheme, any one can forge a signature on an arbitrary message. Finally, we give the corresponding attack method and analyze the reason to produce such the attack, respectively.