<!--Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. This code is free software; you can redistribute it and/or modify itunder the terms of the GNU General Public License version 2 only, aspublished by the Free Software Foundation.  Oracle designates thisparticular file as subject to the "Classpath" exception as providedby Oracle in the LICENSE file that accompanied this code. This code is distributed in the hope that it will be useful, but WITHOUTANY WARRANTY; without even the implied warranty of MERCHANTABILITY orFITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public Licenseversion 2 for more details (a copy is included in the LICENSE file thataccompanied this code). You should have received a copy of the GNU General Public License version2 along with this work; if not, write to the Free Software Foundation,Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USAor visit www.oracle.com if you need additional information or have anyquestions.--> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html> <body bgcolor="white"> Provides interfaces for Diffie-Hellman keys as defined inRSA Laboratories' PKCS #3.<P>Note that these interfaces are intended onlyfor key implementations whose key materialis accessible and available. Theseinterfaces are not intended for keyimplementations whose key material residesin inaccessible, protected storage (such asin a hardware device).<P>For more developer information on how to usethese interfaces, including information onhow to design <code>Key</code> classesfor hardware devices, please refer to thecryptographic provider developer guide:<ul>  <li><a href=    "{@docRoot}/../technotes/guides/security/crypto/HowToImplAProvider.html">    <b>How to Implement a Provider for the    Java<FONT SIZE=-2><SUP>TM</SUP></FONT> Cryptography Architecture    </b></a></li></ul> <h2>Package Specification</h2> <ul>  <li>PKCS #3: Diffie-Hellman Key-Agreement Standard, Version 1.4,      November 1993.</li></ul> <h2>Related Documentation</h2> For further documentation, please see:<ul>  <li>    <a href=      "{@docRoot}/../technotes/guides/security/crypto/CryptoSpec.html">      <b>Java<FONT SIZE=-2><SUP>TM</SUP></FONT>      Cryptography Architecture API Specification and Reference      </b></a></li></ul> @since 1.4</body></html>