Abstract: It is very hard to develop encryption technology used in cheap RFID（Radio Frequency Identification） tags.In this paper，intrusion detection，as a new methodology，is adopted to create security model for RFID system.By analyzing typically security attacks on RFID systems，a solution to get characters of intrusion by integration and statistics of channel log and application log is proposed.A multi-agent structure of RFID intrusion detection is designed based on biological immune mechanism.A BDI model of detector produce agent is designed based on immune tolerance.A BDI model of detecting agent is designed based on multilevel defense and immune memory.At last，multilevel，adaptability and robustness of the model are analyzed.

摘要： 针对无线射频识别技术（RFID）的加密认证等安全策略在廉价标签上的局限性，引入了入侵检测的RFID新型安全策略。通过分析RFID系统的典型安全攻击，提出了基于信道日志和应用日志融合统计的入侵特征提取方法。参考生物免疫机理建立了RFID入侵检测模型多Agent体系结构，参考免疫耐受原理设计了检测器生成Agent BDI模型，参考层次防御和免疫记忆设计了检测Agent BDI模型。最后分析了模型的多层次性、自适应性和健壮性。