基于对等组的P2P安全通信机制

Peer-to-peer secure communication mechanism based on peer group

当前对P2P网络系统安全的研究大多着眼于构造信任和名誉模型,而对通信过程的安全问题研究较少。提出了一种基于对等组实现的P2P安全通信机制——P2PSCM。P2PSCM首先为通信节点构建安全对等组。组内节点相互通信时,先通过交换公私密钥和对称密钥建立节点间安全通信渠道;然后采用对称密钥加密传输数据;最后对接收数据进行身份确认与完整性验证,确保相互间安全通信。

Most of current study about the security of peer-to-peer networks aimed at constructing trust and reputation model, but less at secure communication. This paper proposed a P2P secure communication mechanism called P2PSCM, which was based on peer group. P2PSCM first built a secure peer group among the communication nodes. When two nodes in the group wanted to communcicate, they first exchanged public-private key pair and symmetric key to establish a secure communication channel, then encrypted transmission data by symmetric key and authenticated the data source authentication and integrity when receiving data. With these security policy, P2PSCM could ensure secure communication between nodes.