关键词: 危险理论, 入侵检测, 免疫, 细胞自动机

Abstract: In order to overcome the limitations lied at the classic self-non-self thinking，this paper proposes a novel Intrusion Detection System(IDS) based on double-signal inspired by danger theory.The composition modules and process flow are seriously analyzed according to the corresponding relationship between IDS and HIS.A new approach is proposed to sense danger by introducing cellular Automata.An effective method to construct danger zones is given by combining with the reasoning of production rules.The detection efficiency of the system is improved due to its only response to danger signal.Meanwhile，since the danger is sensed depending on both antigen recognition signal and co-simulation signal，the rate of false alarm has been greatly reduced.

Key words: danger theory, intrusion detection, immune, cellular automata