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Application & OT Security · Advanced

Hermetic Build

A build that is fully isolated from the network and host environment, using only declared, pinned inputs.

Definition

Hermetic builds ensure all dependencies are explicitly specified and fetched by hash, preventing hidden or changed inputs. They improve reproducibility and are part of higher SLSA build integrity goals.

Example

A Bazel build fetches every dependency by pinned hash and runs without network access.

Exam tip

Hermetic = no undeclared inputs.

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