pub const INTERNAL_KEYS: &str = "internal_keys";Expand description
Non-extractable internal signing keys.
Deliberately not IMPORTED_SECRETS: that keyspace wraps its contents
under a KEK derived from the BIP-39 master seed, so anything stored there is
reconstructible by whoever holds the mnemonic. Internal keys exist precisely
to have no such path — their material is generated from the system CSPRNG,
never derived, and lives here instead.
In EXCLUDED_FROM_BACKUP by design, not by omission. A backup containing
this keyspace would be an export of keys the VTA promises never to export.