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Advanced integrity checking and recovery using write-protected storage for enhancing operating system security

This paper contains an enhancement solution to an existing system called: Integrity Checking and Recovery (ICAR) system. ICAR provides a means to check for file integrity and also a feature to restore the file if a breach has been detected. The fact that it uses write protected storage makes it efficient against attacks. The performance degradation issue faced in ICAR system has been reduced here, so that users can now access secure files almost as normal as non-secure files. The improvement is achieved by making a modification to the cache present in the ICAR system. This is done by implementing the concept of augmentation of data structures in LRU page replacement algorithm thus making page operations faster in the cache which improves the overall performance of the system.