随机化代理签名及其在区块链中的应用OA

This study proposes a randomizable proxy signature scheme,which is a new primitive,and proves that our proxy signature scheme is weakly secure,relying on the security of the PS signature scheme in the generic group model.A randomizable proxy signature scheme allows an original signer to delegate his signing rights to a proxy signer,and then anyone can generate another valid proxy signature on the same message.Therefore,our signature scheme provides unlinkability,making it a practical tool for privacy preservation.Our construction,built upon groups with a Type 3 bilinear pairing,is efficient and results in a small signature size.These features make the randomizable proxy signature primitive particularly useful for building privacy-preserving protocols,such as blockchain,e-commerce,and cloud computing.