In this paper we present a secure proxy signature scheme, which allows an original signer to delegate his/her signing capability to a proxy signer. Then the proxy signer can sign a message on behalf of the original signer. The proposed proxy signature scheme is based on the hardness of the decisional Diffie-Hellman problem. We give the formal definition and security model of a proxy signature scheme and prove its security in our security model. Our proxy signature scheme does not use bilinear pairings, which results in greater efficiency and ease of implementation.
Proxy signature, proxy signer, security model, delegation, warrant.
Constantin Popescu, "A Secure Proxy Signature Scheme Based on the Hardness of the Decisional Diffie-Hellman Problem", Studies in Informatics and Control, ISSN 1220-1766, vol. 21(3), pp. 293-302, 2012. https://doi.org/10.24846/v21i3y201208
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