PT. Phase Solusindo
A proxy signature allows a designated person, called a proxy signer, to sign the message on behalf of the original signer. Proxy signatures are very useful tools when one needs to delegate users signing capability to other party. A number of proxy signature schemes have been proposed and succeeded for proxy delegations, but the schemes are in defective in proxy revocations. In this paper, the authors propose proxy signature scheme based on RSA cryptosystem. Their scheme does not consider proxy revocation mechanism, but it is efficient than the existing RSA-based schemes.