} else {
            keyService = EmptyPublicKeyService.getInstance();
        }
        keyService = keyrings.applyTo(keyService);
        File effectiveKeyringsFile = keyrings.getEffectiveKeyringsFile();
        HashCode keyringFileHash = observed(effectiveKeyringsFile).exists()
            ? fileHasher.hash(effectiveKeyringsFile)
            : NO_KEYRING_FILE_HASH;