基于混淆的广播多重签名方案

基于Lin等人于2016年提出的不可区分混淆,提出了一个新的广播多重签名方案,其使用混淆后的验证电路作为验证密钥,对部分签名和多重签名进行验证。在本方案中,每个签名成员生成自己的部分签名,签名收集方只需要将每个成员的部分签名进行模乘,即可得到多重签名。每个签名方的部分签名的长度、签名算法和验证算法的复杂度不随签名人数的多少而变化。本方案满足不可伪造性和不可否认性等性质,同时可以抵抗外部量子攻击。

Obfuscation-based Broadcasting Multi-signature Scheme

Based on the indistinguishability obfuscation,this paper proposed a new broadcast Multi-signature scheme.By using the confused verification circuit as verification key,the part signature and the multi-signature can be verified.In this scheme,after generating the part signature by each signer,multi-signature is obtained by the modulation of the part signature which is collected by signature collector.The length of the part signatures,the complicacy of its algorithm and the complicacy of the verification algorithm are independent when the number of the signers changes.The properties of against external attack,non-forgery and non-disavowal are obtained in this scheme. Its securities are proved in the random oracle model.