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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _secured_storage_parameters(self):
 """ Updates storage parameters with unsecure mode. Returns: dict: Updated storage_parameters. """

        parameters = self._storage_parameters or dict()

        # Handles unsecure mode
        if self._unsecure:
            parameters = parameters.copy()
            parameters['protocol'] = 'http'

        return parameters