Java in a Nutshell, 5th Edition [Electronic resources]

This interface extends RSAPrivateKey and provides a decomposition (based on the Chinese remainder theorem) of the private-key value into the various pieces that comprise it. This interface is useful only if you plan to implement your own cryptographic algorithms. To use this interface, you must have a detailed understanding of the mathematics underlying RSA public-key cryptography. Given a java.security.PrivateKey object, you can use the instanceof operator to determine whether you can safely cast it to an RSAPrivateCrtKey.

public interface 
RSAPrivateCrtKey  extends RSAPrivateKey {
// Public Constants
5.0   public static final long 
serialVersionUID ;  =-5682214253527700368
// Public Instance Methods
java.math.BigInteger 
getCrtCoefficient ( );  
java.math.BigInteger 
getPrimeExponentP ( );  
java.math.BigInteger 
getPrimeExponentQ ( );  
java.math.BigInteger 
getPrimeP ( );  
java.math.BigInteger 
getPrimeQ ( );  
java.math.BigInteger 
getPublicExponent ( );  
}