OpenAlex ·
HermiCache: Enclave-Aware Cache Replacement for Trusted Execution Environments
- Published
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- OpenAlex
- DOI
- 10.48550/arxiv.2609.10634
- Original
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Abstract
Trusted Execution Environments (TEEs) protect enclave memory from untrusted software but remain vulnerable to cache-based side-channel attacks due to shared microarchitectural resources. Existing countermeasures use techniques such as cache partitioning or randomization: these solutions are not ideal if a designer wants fine-grained configurations and a deterministic protection. In this paper, we introduce HermiCache which is an answer to these requirements. HermiCache is designed for RISC-V cores and has been implemented in the OpenHwGroup CVA6 core with a Keystone TEE for the software layer. The solution has an area overhead of 6% on the processor core.
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