中文摘要：

针对多级分簇无线传感器网络拓扑结构的特点，提出一种新的身份认证机制，以解决传统认证方式中点到点直接认证所需耗费的巨大计算量或存储量问题。该机制以基站作为可信第三方，并通过对称加密算法间接实现各相关节点之间的身份认证。该机制既能避免采用非对称密码算法所带来的大量能量消耗，又能解决基于对称密码的传统预分配密钥机制导致的网络扩展性差的问题，能为多级分簇无线传感器网络提供有效的身份认证。

英文摘要：

A novel authentication mechanism, which is implemented based on the feature of the multi-level clustering wireless sensor network topology, is proposed to solve the problem about the huge energy consumption or memory usage in traditional au- thentication mechanism. With the credible base station as the trusted third party, this mechanism can realize indirect authentica- tion for related nodes by utilizing the symmetric encryption algorithm as the basic encryption algorithm. This authentication mechanism can not only avoid the huge energy consumption brought by asymmetric encryption algorithm, but also solve the sca- lability problem of traditional pre-allocated-key mechanism based on symmetric encryption, and is able to provide effective au- thentication service for multi-level clusterin~ wireless sensor networks.