构造适合云的公平交换协议  

Constructing fair-exchange protocols for cloud computing

作　　者：蓝才会[1,2] 王彩芬[1] 

机构地区：[1]西北师范大学数学与信息科学学院,甘肃兰州730070 [2]兰州城市学院信息工程学院,甘肃兰州730070

出　　处：《通信学报》2013年第3期111-118,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(61163038;61063041);甘肃省自然科学基金资助项目(3ZS051-A25-042)~~

摘　　要：针对云计算中数据不是存储在本地而是以密文形式托管到"云端",导致已有的公平交换协议不能很好适应云环境这一问题,构造了一个可在随机预言模型下证明安全的匿名条件的代理重加密方案,并在其基础上设计了一个能运用于云环境交换数据的公平交换协议。The existing fair-exchange protocols can＇t be run in cloud servers, because the user＇s data aren＇t stored in local computers, but be escrowed to ＇clound＇. An anonymous conditional proxy re-encryption scheme was constructed and its security was proved in random oracle model based on modified decisional bilinear Diffie-Hellman problem. At the same time, a fair-exchange protocol based on their scheme was designed, it can be employed when two users exchange their data information in cloud.

关 键 词：云计算 公平交换协议 条件代理重加密 选择密文安全 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]