对等网数据共享中动态解密授权的实现  

Implementation of Dynamic Delegation of Decryption for P2P Data Sharing

作　　者：赵恒[1] 权义宁[1] 胡予濮[1] 

机构地区：[1]西安电子科技大学计算机网络与信息安全教育部重点实验室,西安710071

出　　处：《计算机工程与应用》2005年第6期164-166,共3页Computer Engineering and Applications

基　　金：国家自然科学基金资助项目(编号:60273084);博士点基金资助项目(编号:20020701013)

摘　　要：在对等网络的数据共享中,存在被访问端离线时无法提供即时访问的缺陷。该文提出了一种动态解密授权实现方案,应用多项式秘密分享体制将解密权利授权给多个代理,当授权端不在线时由多个代理共同提供访问。该方案不仅能够防止密钥泄漏、防单个代理滥用授权和防欺诈,而且能够动态更新解密密钥、增删代理和进行代理信息的维护,安全、灵活、有效地解决了这一问题。In P2P data sharing,there is a problem that the accessed peer can't offer instant data when it's off line.This paper presents a scheme of dynamic delegation of the power to decrypt ciphertexts.The power of decryption is distribut-ed to multi-proxy by applying secret sharing,and multi-proxy offer access when the delegator isn't on line.This scheme can not only resisit leaking key,abusing delegation and cheating,but also dynamically change decryption key,add and delete proxy and maintain the proxy's information.It resolves the problem securely,flexibly and efficiently.

关 键 词：对等网 数据共享 动态解密授权 秘密分享 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]