关键词: 无线局域网, 接入点, D-S证据理论, 行为分析

Abstract: With the rapid development of public service of wireless network, the quantities of free Access Points（APs） in open system authentication increase explosively. However, the security problems also rise prominently, especially, personal privacy disclosure brought by fake APs, phishing attack and funnel attack. Referring to the mature methods of spam judge, this paper proposes a secure and trusted access method for AP in open system authentication. This method adopts D-S evidence theory. An inference rule base is built, including SSID, Beacon frame transmission density, PHY features of AP, data forwarding features of AP and et al. Through the analysis and combination of AP behavioral evidences, the decision of AP credibility is given. Therefore the wireless terminals can access into the secure and trusted AP. This method is verified by the typical instance.

Key words: Wireless Local Area Networks（WLAN）, Access Points（AP）, D-S evidence theory, behavioral analysis