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Survivability modeling and evaluation have gained increasing importance. Most existing models assume that the distributions for transitions between states are exponential. However, this assumption does not hold in many real cases. To address this problem, we propose a novel semi-Markov survivability evaluation model, which allows the transitions between states to follow nonexponential distributions...
Virtual machine based services are becoming predominant in data centers or cloud computing since virtual machines can provide strong isolation and better monitoring for security purposes. While there are many promising security techniques based on virtual machines, it is not clear how significant the difference between various system architectures can be in term of survivability. In this paper, we...
In this paper, we present the design and implementation of ITDB, a self-healing or intrusion-tolerant database prototype system. While traditional secure database systems rely on preventive controls and are very limited in surviving malicious attacks, ITDB can detect intrusions, isolate attacks, contain, assess, and repair the damage caused by intrusions in a timely manner such that sustained, self-stabilized...
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