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[Home](/) / [Blog](/blog/) / Why signed permissions

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A signature turns a preference into a claim that travels with evidence.

By the AIFeed team September 2026 6 min read protocol

An unsigned preference file is a note on the door. Anyone can replace it, and nobody can tell.

AIFeed turns the note into a claim that travels with evidence. The manifest is canonicalized with JCS, signed with Ed25519, and pinned to the domain through a DNS record. An agent that verifies the chain knows three things at once: who said it, for which domain, and whether the statement is still current.

> That matters for the boring cases first.
> When a crawler sees training: deny, the question is not what the file says but whether it was forged.

The same machinery makes revocation real. A permission that cannot be withdrawn is not a permission, it is a hope. Status documents are signed by governance keys, checked on use, and bounded in staleness so silence is treated as unknown rather than approval.

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**AIFeed Protocol Contributors** Reference implementation and specifications

- [Delta indexes: skipping what did not change](/blog/delta-indexes/)
- [Revocation with receipts](/blog/revocation/)

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