• 网络与信息安全 •

### 去中心基于属性Σ协议的一般性构造及其应用

1. 1. 闽南师范大学 福建省粒计算及其应用重点实验室，福建 漳州 363000
2. 闽南师范大学 计算机学院，福建 漳州 363000
• 出版日期:2021-09-01 发布日期:2021-09-06

### Generic Construction of Decentralized Attribute-Based Σ-Protocol and Its Applications

YANG Xiaoli, HUANG Zhenjie

1. 1. Fujian Key Laboratory of Granular Computing and Application, Minnan Normal University, Zhangzhou, Fujian 363000, China
2. School of Computer Science, Minnan Normal University, Zhangzhou, Fujian 363000, China
• Online:2021-09-01 Published:2021-09-06

Abstract:

Attribute-based cryptography becomes one of the hot topics in cryptography, since it can provide fine-grained access control and good privacy. Σ-protocol is a 3-move public-coin honest verifier zero-knowledge proof protocol, and has important applications in many fields of cryptography. Firstly, combining the concept of attribute-based cryptography with the zero-knowledge proof, a notion of attribute-based Σ-protocol is introduced with its formal security model. Secondly, based on the standard Σ-protocol, the trapdoor samplable relation and the smooth secret sharing, a general construction of decentralized attribute-based Σ-protocol and corresponding scheme are proposed with the proofs of its securities. Finally, as the applications of decentralized attribute-based Σ-protocol, general constructions of decentralized attribute-based signature and decentralized attribute-based two-tier signature are presented by Fiat-Shamir transformation, respectively. Some concrete schemes are also presented. Performance analysis shows that the proposed attribute-based two-tier signature scheme has obvious advantages in both sizes and computation costs compared with existing schemes.