Collecting Provenance Via the Xen Hypervisor

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Executive Summary

The Provenance Aware Storage Systems project (PASS) currently collects system-level provenance by intercepting system calls in the Linux kernel and storing the provenance in a stackable filesystem. While this approach is reasonably efficient, it suffers from two significant drawbacks: each new revision of the kernel requires reintegration of PASS changes, the stability of which must be continually tested; also, the use of a stackable filesystem makes it difficult to collect provenance on root volumes, especially during early boot.

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