OLSR路由协议中MPR节点安全性研究

Security Study of MPR Nodes in OLSR Routing Protocol

OLSR(最优链路状态路由协议)是一种先应式路由协议,其MPR(多点中继)节点易受恶意攻击,严重时将导致路由协议崩溃。针对这一安全隐患,提出了一种MPR节点综合抗攻击方案:消息加密和消息频率检测技术。消息加密技术主要是对广播的HELLO消息进行加密,防止攻击节点冒充合法节点;频率检测是对HELLO消息发送频率进行检测,若频率过大则可以认为发送该HELLO消息的节点为恶意节点。仿真结果表明,该综合方案可以有效抵制对MPR节点的攻击,保证OLSR路由协议的安全。

OLSR （optimized link state routing protocol ） is a fLrSt response routing protocol. The MPR （Multi-Point Relays） nodes are vulnerable to malicious attacks and the routing protocol will result in serious crash. In response to this security risk, present program of MPR nodes against attacks：technology of message encryption and message frequency detection. Technology of message encryption encrypts HELLO messages which are broadcasted to prevent the attack nodes ; Technology of message frequency detection detects the frequency of HELLO messages, and if the frequency is too large, you can charge the HELLO message as a malicious node. Simulation resuits show that this scheme can effectively resist the attack of the MPR nodes to ensure the safety of OLSR routing protocol.