基于云存储的文件共享策略研究  

A Study on the File-sharing Strategy Based on Cloud Storage

作　　者：龙文光[1] 刘益和[1] 李建平[2] 

机构地区：[1]内江师范学院,四川内江641112 [2]电子科技大学计算机学院,成都611731

出　　处：《激光杂志》2014年第2期59-60,62,共3页Laser Journal

基　　金：四川省科技厅软科学项目阶段成果;(项目编号:2013ZR0089)

摘　　要：云存储具有高可扩展性、低成本等特点,为用户文件共享提供了经济高效的服务,同时也带来了新的安全问题:在不可信的云存储中,如何在保证文件的安全和隐私的前提下,为特定用户共享。该方案提出了基于身份的公钥密码体制基础上,运用高效安全的代理环签名、动态广播加密和双线性对技术,通过授权用户列表,能动态加入和撤销共享用户,不需要更改老用户相关密钥。该方案简单可行,具有可追溯性、匿名性、不可伪造性等特点。Cloud storage, characterized by high extensibility and low cost, offers users the economical and efficient service of file sharing, and in the meantime brings about a new secure problem, that is, how files in the undependable cloud storage are shared by specific users on precondition that their security and privacy are guaranteed. On the basis of identity-based cryptography, the scheme applies proxy ring signature, dynamic broadcast encryption, and bilinear pairings, which are efficient and safe. Through authorized us-er list, it can add and remove the sharing user without changing old users’ secrete key. The scheme is easy, feasible, traceable, anon-ymous and unable to fake.

关 键 词：云存储 代理环签名 动态广播加密 文件共享 双线性对 

分 类 号：TN244.8[电子电信—物理电子学]