DateKeys/TRADEMARKS.md

# Trademarks

"DateKeys" is a reserved name of the DateKeys project. The Apache-2.0 license
of the code and the CC-BY-4.0 license of the specification do not grant any
right to use it as a product, service or organisation name (Apache-2.0 §6).

Allowed without asking:

- Stating compatibility in plain words, for example "implements the DateKey
  protocol", "reads and writes DateKeyCap (.dkc) files" or "compatible with
  DateKeys v0.8.2", as long as it is true for the version named.
- Referring to this project, its specification or its file formats by name in
  documentation, articles and talks.

Not allowed without written permission:

- Naming a product, service, package, domain or organisation "DateKeys" or a
  confusingly similar name.
- Suggesting endorsement by, or affiliation with, the DateKeys project.
- Calling a modified or incompatible implementation "DateKeys".
Initial implementation of the DateKeys Protocol v0.8.1 Reference implementation in Go, built from the implementation plan (milestones M0 to M5): datekey, profile, provider, codec, agewrap, extension, capsule, accesskey, the datekeys CLI, official vectors and fixtures, the mutation corpus, fuzz targets, interop and live tests, CI workflows, traceability and policy documents. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> 2 weeks ago			`# Trademarks`

			`"DateKeys" is a reserved name of the DateKeys project. The Apache-2.0 license`
			`of the code and the CC-BY-4.0 license of the specification do not grant any`
			`right to use it as a product, service or organisation name (Apache-2.0 §6).`

			`Allowed without asking:`

			`- Stating compatibility in plain words, for example "implements the DateKey`
			`protocol", "reads and writes DateKeyCap (.dkc) files" or "compatible with`
Implement v0.8.2 extension data, limits and writer self-checks - extension: data is an opaque []byte; New takes []byte and rejects empty data; key 2 must be a non-empty shortest-form bstr; at most 64 extensions per array; extension_version <= 2^32-1; CheckDisjoint is a linear merge; optional DataValidator with ERR_EXTENSION_DATA_INVALID for known critical extensions and Unusable reports for known noncritical ones. - capsule, accesskey: frame limits on encode and decode with ERR_INTEGRITY; Encrypt and MarshalBody decode their own output before sealing or returning it; unusable extensions are reported. - profile: period and genesis_time bounded to 2^53-1, genesis decoded as unsigned. - codec: Valid removed; empty values never encode as null. - Regression tests for the nested-data seal/open asymmetry, the nondeterministic verdict on NaN-keyed data and the quadratic disjointness check; three new §64 mutations and five more. - Fixtures: time_only_extensions regenerated with opaque data, new time_and_key_portable_extension.dkk; genfixtures gains -only. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> 2 weeks ago			`DateKeys v0.8.2", as long as it is true for the version named.`
Initial implementation of the DateKeys Protocol v0.8.1 Reference implementation in Go, built from the implementation plan (milestones M0 to M5): datekey, profile, provider, codec, agewrap, extension, capsule, accesskey, the datekeys CLI, official vectors and fixtures, the mutation corpus, fuzz targets, interop and live tests, CI workflows, traceability and policy documents. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> 2 weeks ago			`- Referring to this project, its specification or its file formats by name in`
			`documentation, articles and talks.`

			`Not allowed without written permission:`

			`- Naming a product, service, package, domain or organisation "DateKeys" or a`
			`confusingly similar name.`
			`- Suggesting endorsement by, or affiliation with, the DateKeys project.`
			`- Calling a modified or incompatible implementation "DateKeys".`