Efficient identity-based ring signature in standard model

Abstract

The ring signatures in the standard model have too many pairings and multiple-known-signature encounters forgery attack,so a new efficient and safe ring signature was proposed.On the basis of reducing public parameters,a Hash function with secret was introduced into every member,so it achieved the best safety requirements and had the unconditional anonymity.Compared with the existing identity-based ring signature schemes in the standard model,for n members of a ring,the signature only needs two pairings to verify without pre-operation,thus it can greatly improve the efficiency.