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diff --git a/libjava/javax/crypto/SecretKey.java b/libjava/javax/crypto/SecretKey.java
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+/* SecretKey.java -- A key for symmetric cryptography.
+   Copyright (C) 2004  Free Software Foundation, Inc.
+
+This file is a part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or (at
+your option) any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with GNU Classpath; if not, write to the
+
+   Free Software Foundation, Inc.,
+   59 Temple Place, Suite 330,
+   Boston, MA  02111-1307
+   USA
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under terms
+of your choice, provided that you also meet, for each linked independent
+module, the terms and conditions of the license of that module.  An
+independent module is a module which is not derived from or based on
+this library.  If you modify this library, you may extend this exception
+to your version of the library, but you are not obligated to do so.  If
+you do not wish to do so, delete this exception statement from your
+version.  */
+
+
+package javax.crypto;
+
+import java.security.Key;
+
+/**
+ * A secret key for symmetric cryptography.
+ *
+ * <p>This interface defines no new methods over {@link
+ * java.security.Key}, but rather is intended to be a <i>marker
+ * interface</i> and to provide type safety for secret keys.</p>
+ *
+ * <p>The format of secret keys should be <code>RAW</code>, as returned
+ * by {@link java.security.Key#getFormat()}.</p>
+ *
+ * <p>Concrete implementations of this interface should override the
+ * {@link java.lang.Object#equals} and {@link java.lang.Object#hashCode}
+ * methods of {@link java.lang.Object} to use the actual key data rather
+ * than the identity-based default methods.</p>
+ *
+ * @author Casey Marshall (csm@gnu.org)
+ * @see javax.crypto.SecretKeyFactory
+ * @see javax.crypto.Cipher
+ */
+public interface SecretKey extends Key
+{
+}