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Witness: Open-source Framework for Verifying How Your Software Was Built

Written By
JP
James Patterson
Nov 5, 2026

Witness is an open-source command-line tool that records how software gets built, signs that record, and checks it against a policy before the software ships. TestifySec built Witness and donated it to the in-toto ecosystem within the Cloud Native Computing Foundation, and an open community now maintains it.
JP

James Patterson

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