Novel Proxy Signature Scheme with Revocable Proxy Right

In order to solve the problem of proxy revocation,a novel efficient proxy signature scheme with revocable proxy right is proposed.By maintaining an authorized list and a trusted list in Lightweight Directory Access Protocol(LDAP) server and setting write access only to original signer,the novel scheme does not rely on the on-line trusted third part.Analysis shows that the new proposal fulfills all the security requirements of proxy signatures such as strong unforgeability,verifiability,strong undeniability,strong identifiability,distingulshability,prevention of misuse.Compared with the existing solutions,this scheme has less computation and fewer interactions in signature issuing and verification phase.