A new nonrepudiable threshold proxy signature scheme with valid delegation period

Authors:
Min-Shiang Hwang;Shiang-Feng Tzeng;Chun-Ta Li
Affiliations:
Department of Management Information Systems, National Chung Hsing University, Taichung, Taiwan, R.O.C.;Department of Computer Science and Information Engineering, National Central University, Taiwan, R.O.C.;Department of Computer Science, National Chung Hsing University, Taiwan, R.O.C.
Venue:
ICCSA'07 Proceedings of the 2007 international conference on Computational science and its applications - Volume Part III
Year:
2007

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Abstract

In the (t, n) proxy signature scheme, the signature, signed by a signer originally, can be signed by t or more proxy signers out of a proxy group of n proxy signers. In this paper, we propose a new secure non-repudiable threshold proxy signature scheme with valid delegation period. In the scheme, the actual signers from the proxy group are known and can be identified. Furthermore, the proposed scheme is efficient in terms of computational complexity.