While traditional secure database systems rely on prevention control and are very limited in surviving malicious attack, an intrusion-tolerant database system can operate through attacks in such a way that the system can continue delivering essential services in the face of attacks. The emphasis of survivability is on continuity of operations, with the understanding that the security precautions cannot guarantee that systems will not be penetrated and compromised. In this paper, we propose a framework of model-based evaluation of the survivable intrusion tolerant database system. We focus on modeling the behaviors of an intrusion tolerant database system which can detect intrusions, isolate attacks, contain, assess, rejuvenate and repair limited in surviving malicious attacks. We contain the necessary quantitative metrics to measure the availability, integrity, and survivability. Quantitative measures are proposed to characterize the capability of a resilient database system surviving intrusions.
Security, Availability, Survivability, Intrusion Tolerance, Software Rejuvenation, Database System
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