1/*
2 *  Licensed to the Apache Software Foundation (ASF) under one or more
3 *  contributor license agreements.  See the NOTICE file distributed with
4 *  this work for additional information regarding copyright ownership.
5 *  The ASF licenses this file to You under the Apache License, Version 2.0
6 *  (the "License"); you may not use this file except in compliance with
7 *  the License.  You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 */
17
18package javax.crypto;
19
20import java.security.Key;
21
22/**
23 * A cryptographic secret (symmetric) key.
24 * <p>
25 * This interface is a <i>marker interface</i> to group secret keys and to
26 * provide type safety for.
27 * <p>
28 * Implementations of this interface have to overwrite the
29 * {@link Object#equals(Object) equals} and {@link Object#hashCode() hashCode}
30 * from {@link java.lang.Object} so comparison is done using the actual key data
31 * and not the object reference.
32 */
33public interface SecretKey extends Key {
34
35    /**
36     * The serialization version identifier.
37     *
38     * @serial
39     */
40    public static final long serialVersionUID = -4795878709595146952L;
41}