Efficient ID-based proxy ring signature scheme

The existed proxy ring signature schemes have a common flaw.There is too much pairings computation at signature.This paper proposed an efficient ID-based proxy ring signature scheme.As compared with the existed proxy ring signature schemes,this scheme was more efficient because it has no computational cost of bilinear pairings at signature generation and only two pairings computation at signature verification.It has advantages of proxy signature and ring signature.It is very useful when proxy signers needed to sign messages on behalf of the original entity while providing anonymity.