docs: public Packer useAES(final String passphrase, final boolean useRandomIV) throws NoSuchAlgorithmException,
  			NoSuchPaddingException {
  		initCipher();
  		initCipherIV((useRandomIV ? generateRandomIV(aesCipherLen) : getDefaultIV(aesCipherLen)),
  				(useRandomIV ? AESTYPEIV.RANDOM_IV : AESTYPEIV.FAKE_IV));
  		initCipherKey(passphrase);
  		return this;
  	}