Patent ID: 9641340
Date: 2017-05-02
CPC Classifications: H04L

Claim:
1. A certificateless multi-proxy signature method, comprising: computing, by a proxy signature device, a public key and a private key of the proxy signature device according to a public parameter, wherein the public key is corresponding to the private key; acquiring a verification result of a standard signature; determining, according to the verification result, whether the standard signature is valid, wherein the standard signature comprises T and V, wherein T is obtained through computation by a standard signature computing device according to a formula T=rP, and wherein V is obtained through computation by the standard signature computing device according to a formula V=D computing a partial proxy signature of the proxy signature device according to the private key when the verification result is used to represent that the standard signature is valid; and sending the partial proxy signature to a proxy signature device administrator, so that after the proxy signature device administrator obtains a multi-proxy signature through computation according to the partial proxy signature, a multi-proxy signature verification device verifies the multi-proxy signature, wherein r is randomly selected from Z*