关键词: 网络安全, 位置密钥, 安全区域, 网络攻击

Abstract: The Mobile Ad-Hoc Networks（MANETs） is especially vulnerable in hostile environments due to the uncertain mobility and the limitation in computation and storage of mobile nodes. Though some existing schemes based on node location can defend some attacks, most of them are only applied in static networks. A novel notation-security Area（SA） is presented by employing location key. This scheme can defend not only replication attack but also Sybil attack and wormhole attack.

Key words: network security, location key, security area, network attacks