Compact Ring Signature in the Standard Model for Blockchain

Ring signature is a variant of digital signature, which makes any member in a group generate signatures representing this group with anonymity and unforgeability. In recent years, ring signatures have been employed as a kind of anonymity technology in the blockchain-based cryptocurrency such as Monero. Recently Malavolta et al. introduced a novel ring signature protocol that has anonymity and unforgeability in the standard model [33]. Their construction paradigm is based on non-interactive zero-knowledge (NIZK) arguments of knowledge and re-randomizable keys.