Game Theoretical Model for Adaptive Intrusion Detection System
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We present a self-adaptation mechanism for network intrusion detection system based on the use of game-theoretical formalism. The key innovation of our method is a secure runtime definition and solution of the game and real-time use of game solutions for immediate system reconfiguration. Our approach is suited for realistic environments where we typically lack any ground truth information regarding traffic legitimacy/maliciousness and where the significant portion of system inputs may be shaped by the attacker in order to render the system ineffective. Therefore, we rely on the concept of challenge insertion: we inject a small sample of simulated attacks into the unknown traffic and use the system response to these attacks to define the game structure and utility functions. This approach is also advantageous from the security perspective, as the manipulation of the adaptive process by the attacker is far more difficult.
KeywordsUtility Function Nash Equilibrium Pure Strategy Solution Concept Intrusion Detection System
This material is based upon work supported by the ITC-A of the US Army under Contract No. W911NF-10-1-0070. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the ITC-A of the US Army. Also supported by Czech Ministry of Education grants 6840770038 and AMVIS-AnomalyNET. Also supported by MVČR Grant number VG2VS/242.
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