<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _ReadEncryptedData(self, read_size):
 """Reads encrypted data from the file-like object. Args: read_size (int):
 number of bytes of encrypted data to read. Returns: int: number of bytes of encrypted data read. """

    encrypted_data = self._file_object.read(read_size)

    read_count = len(encrypted_data)

    self._encrypted_data = b''.join([self._encrypted_data, encrypted_data])

    self._decrypted_data, self._encrypted_data = (
        self._decrypter.Decrypt(self._encrypted_data))

    self._decrypted_data_size = len(self._decrypted_data)

    return read_count