在有些情况下,需要将验证者限定为某一个人。利用基于身份的密码体制,提出了一种强指定验证人签名和一种强指定验证人多重代理签名,并对其安全性进行了分析。在签名代价和验证代价上,提出的强指定验证人签名比Kang等人的方案要低。提出的强指定验证人多重代理签名可以同时授权给n个代理人,可以有效防止代理签名人对签名权的滥用。
We should specify a verifier in some circumstances. Using identity-based cryptography, this paper proposed a strong designated verifier signature and a strong designated verifier multi-proxy signature. It also analyzed the proposed schemes. The proposed strong designated verifier signature scheme was lower than Kang et al. ' s scheme in the signing cost and verifying cost. The proposed strong designated verifier multi-proxy signature scheme could delegate n proxy signers. Thus it could prevent proxy signers abusing signing authority.