public final void init(int opmode, Key key, AlgorithmParameters params) throws InvalidKeyException, InvalidAlgorithmParameterException
public final void init(int opmode, Certificate certificate) throws InvalidKeyException
  public final void init(int opmode, Key key, AlgorithmParameters params)    throws InvalidKeyException, InvalidAlgorithmParameterException  {    init(opmode, key, params, new SecureRandom());  }