Step 3 of ADR 0044 (D3, D18, D19). A shared space's data keys are
sealed on a device to each member's public keys; the instance keeps
what devices sealed and never opens it.
- halkyon_keys: the safety code of two accounts' public keys
(`safetyCode`), 60 digits, the same on both sides.
- halkyon_base: the register hands out accounts' public keys
(`public-keys-of`, local and remote); the table `shared_space_key`
and the endpoint `sharedSpaceKeys` (memberKeys, keysNeeded, seal,
mine). Only the Owner and Editors seal, the first key sealed to a
member stays, and a member's keys go with their membership. Every
host's migration creates the table.
- halkyon_app: `ContentCipher` seals a key to another account and
opens one sealed by another; `SharedKeys` shares a space's key with
its members, seals keys to newcomers and opens the person's own,
holding each member to the public keys `KeyPins` pinned on first
sight (`key_pins.json` in the person's folder), a change refused
until trusted anew.
Learn takes them into its `Privacy` in step 4.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
Tizian 「ティツィアーン」
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