Abstract: Existing Peer-to-Peer storage network can not guarantee confidentiality and security of the clients’ files on the distrusted nodes, and only uses the low efficiency way of redundancy copies to ensure the availability of their documents. Aiming at this problem, this paper proposes a new kind of architecture of peer-to-peer storage network which can meet different clients’ needs. It proposes the system according to the defects of the existing Peer-to-Peer storage network system. Results of analysis shows that the system can meet the different needs of occasions, and ensure the survivability of storage networks effectively.

Key words: Peer-to-Peer storage network, survivability, client needs, confidentiality, availability

摘要： 现有对等存储网络不能保证用户文件在不可信节点上的机密性和安全性，而且仅采用低效的冗余副本方式保证其文件可用性。针对该问题，提出一种适用于不同用户需求的可生存性对等存储网络系统。分析结果表明，该系统能满足不同的需求场合，并能有效地保证存储网络的可生存性。

关键词: 对等存储网络, 可生存性, 用户需求, 机密性, 可用性

CLC Number: 

• TP309