Specialized Cybersecurity & Cognitive Security
Hardware-Enforced Security with SGX and SEV
Trusted execution environments move sensitive computation into hardware-isolated enclaves so that even a compromised host OS cannot read the data or code inside. Intel SGX and AMD SEV are the two most common options for cloud and server workloads. They protect against a curious or compromised hypervisor, but they add complexity around attestation, memory limits, and patching, and they are not a substitute for good software design.
Points clés
- Use enclaves for the smallest sensitive surface, such as key handling or confidential inference, not whole applications.
- Verify remote attestation before releasing secrets or accepting enclave output.
- Keep enclave code minimal and auditable, since debugging inside an enclave is hard.
- Patch microcode and firmware on a schedule, because enclave security depends on the silicon.
- Plan for memory and performance limits, which are tighter inside enclaves.
- Protect keys with hardware-backed storage and rotation, not just enclave memory.
- Monitor attestation failures and treat them as security events, not noise.
- Document the threat model so you know which attacks enclaves actually stop.
Questions fréquentes
Do enclaves protect against physical attacks?
Some do, but physical access and side-channels remain risks that need separate controls.
Is SGX still viable for new projects?
It depends on the platform generation and support; evaluate current Intel guidance before committing.
What is the hardest part of running enclaves?
Attestation, patching, and keeping enclave code small enough to audit.
Can enclaves replace encryption at rest?
No. They protect data in use, while storage encryption protects data at rest.
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