Provides interfaces for Diffie-Hellman keys as defined in RSA
Laboratories' PKCS #3.
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).
For more developer information on how to use these interfaces,
including information on how to design Key classes for
hardware devices, please refer to the cryptographic provider