public PgpKeyId(long keyId) {
        asLong = keyId;
        asHex = toHex(keyId);
    }

    public PgpKeyId(PGPPublicKey keyId) {
        this(keyId.getKeyID());
    }

    public PgpKeyId(PGPSignature signature) {
        this(signature.getKeyID());
    }

    public PgpKeyId(String keyId) {
        asLong = toLong(keyId);
        asHex = toHex(asLong);
    }

    @Override

    private static final SecureRandom RANDOM = new SecureRandom();

    private static final String BASE = StringUtil.toHex(getAddress()) + StringUtil.toHex(System.identityHashCode(RANDOM));

    /**
     * UUIDを作成します。
     *
     * @return UUIDの文字列
     */
    public static String create() {