Signing Is for the Bad Days
The article discusses the importance of implementing signature verification in software supply chains to prevent security incidents. It highlights the limitations of relying solely on hash-based verification methods, which cannot confirm the integrity of the original files. The author emphasizes the need for robust tools like TUF and Sigstore to enhance security against potential compromises in build systems.
- ▪The article argues that signatures provide essential security assurances that hashes alone cannot offer.
- ▪It introduces Santiago Torres-Arias, a key figure in developing tools like TUF and Sigstore for supply chain security.
- ▪The author explains how TUF mitigates risks by separating signing roles and keys to protect against compromised infrastructure.
Opening excerpt (first ~120 words) tap to expand
Signing is for the bad dayssupply-chainsecuritypackage-managers May 24, 2026 I have had roughly the same conversation four or five times in the last month. I’m explaining why a registry should adopt Sigstore, or why a build pipeline should emit in-toto attestations, and the person across the table says some version of: we already use TLS to the registry, the registry already hashes the tarballs, the lockfile already pins the hash, what does a signature add? And on a Tuesday afternoon when nothing has gone wrong, the honest answer is that it adds a bit of CPU on publish and a bit of YAML in the workflow and not much else you can see.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Andrew Nesbitt.
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