研究了802.11 无线局域网的体系结构和其安全机制,对基于WLAN 的CBTC 数据传输系统的安全性进行了分析,提出了基于IPSec 隧道协议安全加强措施,构建了基于802.11 的CBTC 数据传输系统试验平台,进行了数据传输试验,验证了IPSec 的有效性。关键词:安全;CBTC;802.11;WEP;IPSec;Abstract: This essay establishes the model of protocol layer of DCS based on WLANin CBTC and makes a study on safety and security performance of 802.11. A separateaccess protection process based on IPSec is proposed. The test bed of DCS based onWLAN in CBTC system is built; the test of data transmit and receive proves that thegateway is valid to ensure the security of the data communication.Key words:CBTC;802.11;WEP;security; IPSec
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