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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 new(cls, alias, sealed_obj, algorithm, key, key_size):
 """ Helper function to create a new SecretKeyEntry. :returns: A loaded :class:`SecretKeyEntry` instance, ready to be placed in a keystore. """

        timestamp = int(time.time()) * 1000

        raise NotImplementedError("Creating Secret Keys not implemented")