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/**
* Provides interfaces for Diffie-Hellman keys as defined in RSA
* Laboratories' PKCS #3.
* <P>Note that these interfaces are intended only for key
* implementations whose key material is accessible and
* available. These interfaces are not intended for key implementations
* whose key material resides in inaccessible, protected storage (such
* as in a hardware device).
* <P>For more developer information on how to use these interfaces,
* including information on how to design <code>Key</code> classes for
* hardware devices, please refer to the cryptographic provider
* developer guide:
* <ul>
* <li> {@extLink security_guide_impl_provider
* How to Implement a Provider in the Java Cryptography Architecture}</li>
* </ul>
* <h2>Package Specification</h2>
* <li>PKCS #3: Diffie-Hellman Key-Agreement Standard, Version 1.4,
* November 1993.</li>
* <h2>Related Documentation</h2>
* For further documentation, please see:
* <li>
* {@extLink security_guide_jca
* Java Cryptography Architecture (JCA) Reference Guide}</li>
* @since 1.4
package javax.crypto.interfaces;