基于矢量空间的属性基签密方案

Attribute-Based Signcryption Scheme on Vector Space

本文提出了属性基签密方案,通过引入签密思想,将属性基加密ABE改造为属性基签密ABSC,使其可以近似一次加密运算的代价完成加密和签名,或以近似一次签名运算的代价完成双向认证;通过在矢量空间上对AB-SC进行的门限构造,打破了阈值对算法执行的限制;并且基于离散对数问题进行了可验证性构造,可以发现和避免来自于协议执行方内部的欺骗.

This paper proposed atafbute-based signeryption （ABSC） scheme. By introducing the idea of signeryption, at- tribute-based eneryption（ABE） was improved to attribute-based signeryption, which can complete eneryption and signature with the cost of once encryption, or to complete the mutual anthention and signature with the cost of once eneryption, or to complete the mu- tual authentication with the cost of once signature. Through constructing the access structure on vector space, ABSC breaks the threshold limit. And based on the discrete logarithm problem, the verification algorithm was designed so that the deceptions from the internal participants can be found.