支持加密外包的基于属性加密方案

Attribute-based Encryption with Outsourced Encryption

基于属性加密算法解决了外包环境下数据的安全存储和细粒度访问控制问题,但广泛使用的移动设备难以满足该算法在加密时的性能要求。针对该问题,提出一种支持加密外包的基于属性加密方案。该方案将共享访问策略按照访问树的特点构造为一般矩阵的等价矩阵,将其构造及加密外包给云加密服务器,使得客户端仅需要3次指数运算即可完成一次加密。实验结果表明,该方案能有效应用于移动设备。

The attribute-based encryption solves the problem of secure storage of data and fine-grained access control in the outsourcing environment,but the widely used mobile devices cannot meet the performance requirements of the algorithm when encrypting.In response to this problem,an attribute-based encryption scheme that supports encryption outsourcing is proposed.This scheme constructs the shared access strategy into an equivalent matrix of the general matrix according to the characteristics of the access tree,and outsources its construction and encryption to the cloud encryption server.By using this scheme,the user client only needs three exponential operations to complete one encryption.Experimental results indicate that the scheme can be effectively applied to mobile devices.