关键词: Ad hoc网络, 消息认证算法, 实体认证算法

Abstract: To obtain the target of network communication exist in every where，We must research on Ad hoc network.In Ad hoc network，to ensure secure communication of each ad hoc network node，We must authenticate each node’s identity within the network.In this paper，we summarize some authentication mechanisms of Ad hoc network security in recent years.We conclude security authentication mechanism based on symmetric cryptography algorithm and asymmetric cryptography algorithm respectively，and then summarize the conclusion based on the evaluation of these security mechanisms.

Key words: Ad hoc network, algorithm for message authentication, algorithm for entity authentication