code: public Packer useAESwithRandomIntIV(final String passphrase) throws NoSuchAlgorithmException,
  			NoSuchPaddingException {
  		initCipher();
  		integerIV = (rnd.nextInt() & 0x7FFFFFFF);
  		initCipherIV(generateMdfromInteger(this.integerIV, aesCipherLen), AESTYPEIV.RANDOM_INT_IV);
  		initCipherKey(passphrase);
  		return this;
  	}
docs: Sets he usage of "AES/CBC/PKCS5Padding" with a Random Integer IV for encryption (default no). Instead
  of use full-random-IV, use a integer seed (this allow compact output)
  
  @param passphrase shared secret
  
  @return
  @throws NoSuchAlgorithmException
  @throws NoSuchPaddingException