LastDeviceRecoveryKey

The offline last-device recovery key of a user: a 32-byte Ed25519 seed and its 32-byte public key. Created by ProtocolEngine.createLastDeviceRecoveryKey; the application keeps it offline (for example printed or in a password manager) in the canonical text form encode. Only publicKey is ever sent to the server. The library never persists it.

Whoever holds this key can replace the server authentication key of every registered device of the user it is registered for.

Equality compares the public key. toString never prints key bytes.