基于对称密码学针对上下文信息匹配的消息传输算法的安全策略

Security Strategy of Message Transmission Algorithm for Context Information Matching Based on Symmetric Cryptography

为了加密保护在不影响机会网络消息传输算法自身传输效率的前提下上下文信息可能暴露在不可信任的机会网络节点环境中。提出了一种基于上下文信息的可搜索对称密码算法对数据传输进行加密。该算法将包含目的节点关键信息的关键字转换成为可搜索并可加密的消息头,将加密算法与信息数据的关键字优化配对,既能够向目的节点进行安全可靠的数据传输,亦可在数据传输过程中对其进行加密处理以保证其安全性。釆用网络仿真工具ONE对该信任路由算法进行模拟实验,结果表明,利用对称密码学实施安全策略更符合机会网络节点特征,并且本文采用的安全策略并不影响其数据到达率以及消息较大延迟;本文所建立的算法较之现有已报道的算法,具有较高的数据包转发成功率以及较小的消息延迟率,二者达到平衡。

In order to protect the encryption from being affected by the efficiency of the opportunistic network message transmission algorithm,context information may be exposed in the environment of untrusted opportunistic?network node.A searchable symmetric cipher algorithm based on context information was proposed to encrypt data transmission.The algorithm could transform key words of destination node to searchable encryption message header,and automatically match searchable encryption message header with keyword trapdoor,which not only transmitted data safely and reliably to the destination node,but also encrypted it in the process of data transmission to ensure its security.The results based on ONE simulator showed that that security strategy for message transmission algorithm based on context information were more consistent with characteristic of opportunistic network nodes,and it did not affect the data arrival rate and message delay.Compared with other reported algorithms,the one in the study was verified to have excellent performance which brought forward success ratio and message latency into balance.