'Deserializes and verifies the value created by :meth:`._serialize`.
:param str value:
The serialized value.
:returns:
Deserialized object.'

def _deserialize(self, value):

    (encoded, timestamp, signature) = value.split('|')
    if (not (signature == self._signature(self.name, encoded, timestamp))):
        raise SessionError('Invalid    signature    "{0}"!'.format(signature))
    if (int(timestamp) < (int(time.time()) - self.max_age)):
        return None
    decoded = parse.unquote(encoded)
    deserialized = pickle.loads(decoded.encode('latin-1'))
    return deserialized
