Metior: A Comprehensive Model to Evaluate Obfuscating Side-Channel Defense Schemes
Metior: A Comprehensive Model to Evaluate Obfuscating Side-Channel Defense Schemes
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Metior:评估混淆侧通道防御方案的综合模型
DOI:
10.1145/3579371.3589073
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Yan, Mengjia
中科院分区:
文献类型:
--
作者:
Deutsch, Peter W.;Na, Weon Taek;Bourgeat, Thomas;Emer, Joel S.;Yan, Mengjia
Microarchitectural side-channels enable an attacker to exfiltrate information via the observable side-effects of a victim's execution.Obfuscatingmitigation schemes have recently gained in popularity for their appealing performance characteristics. These schemes, including randomized caches and DRAM traffic shapers, limit, but do not completely eliminate, side-channel leakage. An important (yet under-explored) research challenge is the quantitative study of the security effectiveness of these schemes, identifying whether these obfuscating schemes help increase the security level of a system, and if so, byhow much.In this paper, we address this research challenge by presenting Metior, a comprehensive model to quantitatively evaluate the effectiveness of obfuscating side-channel mitigations. Metior offers a way to reason about the flowof informationthrough obfuscating schemes. Metior builds upon existing information theoretic approaches, allowing for the comprehensive side-channel leakage evaluation of active attackers, real victim applications, and state-of-the-art microarchitectural obfuscation schemes. We demonstrate the use of Metior in the concrete leakage evaluation of three microarchitectural obfuscation schemes (fully-associative random replacement caches, CEASER-S, and Camouflage), identifying unintuitive leakage behaviours across all three schemes.
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