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A Secure Proxy Signature Scheme with Delegation by Warrant

Constantin POPESCU
Department of Mathematics and Computer Science, University of Oradea
Oradea 410087, Romania

Abstract: A proxy signature scheme is a variation of the ordinary digital signature schemes which enables a proxy signer to generate signatures on behalf of an original signer. In this paper, we present a secure proxy signature scheme. Our proxy signature scheme is based on the difficulty of solving the discrete logarithm problem. We prove that our proxy signature scheme meets all the security requirements for a proxy signature scheme.

Keywords: Cryptography, proxy signature, proxy signer, delegation, discrete logarithm problem, warrant.

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Constantin POPESCU, A Secure Proxy Signature Scheme with Delegation by Warrant, Studies in Informatics and Control, ISSN 1220-1766, vol. 20 (4), pp. 373-380, 2011.