See: Description
Interface  Description 

DSAKey 
The interface to a DSA public or private key.

DSAKeyPairGenerator 
An interface to an object capable of generating DSA key pairs.

DSAParams 
Interface to a DSAspecific set of key parameters, which defines a
DSA key family.

DSAPrivateKey 
The standard interface to a DSA private key.

DSAPublicKey 
The interface to a DSA public key.

ECKey 
The interface to an elliptic curve (EC) key.

ECPrivateKey 
The interface to an elliptic curve (EC) private key.

ECPublicKey 
The interface to an elliptic curve (EC) public key.

RSAKey 
The interface to an RSA public or private key.

RSAMultiPrimePrivateCrtKey 
The interface to an RSA multiprime private key, as defined in the
PKCS#1 v2.1, using the Chinese Remainder Theorem
(CRT) information values.

RSAPrivateCrtKey 
The interface to an RSA private key, as defined in the PKCS#1 standard,
using the Chinese Remainder Theorem (CRT) information values.

RSAPrivateKey 
The interface to an RSA private key.

RSAPublicKey 
The interface to an RSA public key.

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 these cryptographic provider developer guides: