Glossary
Defense in Depth
A security strategy that layers independent controls so that if one fails, others still stand between an attacker and the asset.
Defense in depth assumes no single control is perfect. Instead of relying on one boundary, it stacks independent, overlapping layers - network, host, runtime, supply chain, and data controls - so a failure at any one layer does not expose the asset.
Applied to a self-hosted governance layer, defense in depth means network egress rules, single-tenant isolation, a hardened container runtime, supply-chain attestation, customer-held keys, and optional enclaves each add a wall, rather than trusting any one of them alone.
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