Generate a dict of security data for "initial" data.

def generate_security_data(self):
        """Generate a dict of security data for "initial" data."""
        timestamp = int(time.time())
        security_dict = {
            'content_type': str(self.target_object._meta),
            'object_pk': str(self.target_object._get_pk_val()),
            'timestamp': str(timestamp),
            'security_hash': self.initial_security_hash(timestamp),
        }
        return security_dict