基于BLS的动态云数据完整性验证方案

A DYNAMIC INTEGRITY VERIFICATION SCHEME OF CLOUD STORAGE BASED ON BLS

随着云存储技术的发展,更多的用户选择将数据存储在云端,这虽然为用户节约了存储空间,但同时也让用户失去了对数据的控制权,无法确保云端数据的完整性.因此,检验数据的完整性便成为一个亟需解决的问题.当前许多数据完整性验证方案仍存在无法支持全动态更新(插入、修改和删除)的问题.本文提出一种基于BLS(Boneh–Lynn–Shacham signature scheme,BLS)短签名即基于双线性对构造的云数据完整性验证方案,实现了对云端数据的高效动态完整性更新和验证.经过实验分析,本文所提方案在达到同等安全程度上,极大地缩短了签名的长度,并提高了云存储空间的利用率.

With the development of the cloud storage technology, more and more users choose to store the data in the cloud, it saves storage space for the user but users also lose control of the data at the same time and cannot ensure the integrity of the cloud data. As a result, solving the integrity verification of the data becomes a necessary.Currently, many data integrity verification schemes are still unable to support the whole dynamic update including inserting, modifying, and deleting.In this paper, a scheme of cloud data integrity verification based on BLS short signature is proposed, and it is one to realize dynamic integrity update and verification of cloud data based on bilinear pair construction.Experimental analysis suggests that the proposed scheme has greatly reduced the length of signature and improved the utilization rate of cloud storage space.