抵御无线传感器网络中的重放攻击

分析当前无线传感器网络中抵御拒绝服务攻击的各种方案,分别存在安全性不强、误差较大、能耗较高,以及内存需求较大等问题。这些方案不适合安全性要求较高但资源严格受限的传感器节点。提出一种轻量注册认证算法,该算法采用移位加密技术,通过＂注册-查询＂机制,抵御重放攻击,确保网络的基本安全。通过仿真实验,证实该算法在存在较多恶意节点情况下,仍具有较高的认证率和数据新鲜性,并与其它方案在网络能耗方面进行对比,也显示出明显的优势。

Against Replay Attack in Wireless Sensor Networks

The paper analyzes the current schemes of wireless sensor networks against the denial of service attacks,in which such problems exist as weak security,larger error,higher energy consumption,and larger memory requirement.Therefore,they are not suitable for the sensor nodes with high security requirement and strictly limited resources.It presents a lightweight registration authentication algorithm,which adopts the shift encryption,and uses the ＂register-query＂ mechanism to prevent the replay attack so as to ensure the basic network security.The simulation results confirm that the algorithm still has higher certification rate and data freshness in the instance of many malicious nodes.Moreover,compared with other schemes in network energy consumption,it is obviously superior to them.