基于三因素节点评估的WSN安全认证方案

Secure Authentication Scheme of WSN Based on Tri-element Node Evaluation

为减少传感器节点的资源利用率并提高网络安全性,提出一种新的无线传感器网络认证方案。在计算节点信任度时通过引入时间片、安全行动系数和交互频度计算节点信任度,防止自私节点伪装成正常节点,使信任度与当前节点行为紧密相关,避免节点通过很少的交易次数达到较高的信任度。设计身份标识、密码、智能卡相结合的认证方案,用户在与传感器节点认证之前,网关通过查询节点的信任度找到可信的节点与用户进行认证,实现可信的传感器节点、网关节点和用户三者之间的交互认证,并且使用户能方便地更改密码。分析和仿真结果表明,与现有用户认证方案相比,该方案能够抵制重放攻击、内部攻击、伪装攻击,同时计算花费少,适用于对安全性和性能要求较高的无线传感器网络。

To reduce the resource use of sensors and enhance the security of Wireless Sensor Network（WSN）,a trust-based authentication scheme is proposed and it calculates the node trust by introducing the time slice,the coefficient of safety operations and the frequency of interaction.This makes it difficult for selfish nodes to masquerade as normal nodes,makes trust behavior closely related to the current node,and prevents nodes from achieving higher trust through few trades.Then through combining the identification,the password and the smart card,a user authentication scheme is designed.Before the user authenticates with the sensor node,the gateway node needs to query the trust of nodes and find the trusted node.The optimized certification scheme is used to realize the interaction among nodes,gateway nodes and user can change the password easily.The safety analysis,the performance analysis and the result of the simulation show that,compared with the previous proposed user authentication schemes,this scheme can resist replay attack,inside attack,masquerading,etc.Meanwhile,it costs little time.Thus,this scheme is suitable for WSN which has a high request for the security and performance.