Robust and Efficient Response to TCG TOCTOU Attacks in TPVM

This paper aims to defeat TCG TOCTOU attacks occurring in trusted para-virtualized machines (TPVM). We propose a robust and efficient response mechanism (RERM). Compared to the existing response mechanisms, RERM is more effective in defeating the TPVM TCG TOCTOU attacks without incurring CPU overhead during the normal system execution. We verify the security ability of RERM via both model checking based formal verification techniques and experiments.