code: CipherLite createAuxiliary(long startingBytePos)
              throws InvalidKeyException, NoSuchAlgorithmException,
              NoSuchProviderException, NoSuchPaddingException,
              InvalidAlgorithmParameterException {
          return scheme.createAuxillaryCipher(secreteKey, cipher.getIV(),
                  cipherMode, cipher.getProvider(), startingBytePos);
      }
docs: Returns an auxiliary {@link CipherLite} for partial plaintext
  re-encryption (or re-decryption) purposes.
  
  @param startingBytePos
  the starting byte position of the plaintext. Must be a
  multiple of the cipher block size.