A Secure Proxy-Protected Signature Scheme Based on the Strong RSA Assumption

Ordinary Signature Scheme is one of the most important primitive of public-key cryptography. As a variation of ordinary digital signature scheme, a proxy signature allows a designated person, called a proxy signer, to sign the message on behalf of the original signer. A proxy signature now-a-days is an active research topic, which attracts many researchers' attentions. However, most proposed proxy signature schemes are based on discrete logarithm and pairings. A few proxy signature schemes are built based on RSA assumption and factoring problems. To the best of the authors' knowledge, this is the first proxy-protected signature scheme based on the strong RSA assumption, which meets the security requirement of the proxy signature. The proposed scheme is existential unforgeable against adaptive chosen message attacks.

Provided by: EuroJournals Topic: Security Date Added: Apr 2010 Format: PDF

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