Secure multiple-times proxy signature scheme

Proxy signature, where the original signer can delegate his signing authority to the proxy signer, is frequently applied to many applications, such as the mobile agents system, electronic-vote etc. In these practical circumstances, as the signing ability of the proxy signer may be abused, we introduce the multiple-times proxy signature scheme, which restricts the signing ability of the proxy signer. The proposed scheme can restrict the attacker's forgery and the abuse of the proxy signer, and release the overhead of revocation. Finally, we support our scheme with detailed security and performance analysis.