Mobile Ad Hoc Networks which has the dynamic and self-organization and multi-jumping feature is more vulnerable to a variety of malicious attacks. Tampering attacks is the most serious attack. In this paper, it analyzed in detail the tampering attacks, and proposed a strategy to solve it. The chained k-MAC values computed by all intermediate nodes during the route discovery, together with the authenticated neighbor information provided by the neighbor maintenance scheme, enable it to detect Tampering attacks and varied attacks derived from it, which can enhance the safety of routing protocol.%由于移动Ad Hoc网络具有动态变化的特性以及自组织和多跳性的特点,更容易遭受多种恶意攻击.其中篡改攻击就是最严重的一种攻击.本文详细剖析了篡改攻击问题,针对此问题提出了一种简洁的解决方案.此方案利用路由发现过程中中间结点计算的MAC值以及邻居维护机制提供的认证信息一起能够很好的抵抗篡改攻击,提高了路由协议的安全性.
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