Products that have encryption features require FSS (Federal Security Service) approval that is called FSS Notification. All products that must be approved through FSS mentioned in the List of encryption means (article 2.19 of the «Non-tariff regulated product list»).
What should a manufacturer do if the product does not contain encryption but the customs services require the FSS Notification? We know the answer! There's a special document proving there isn't any encryption that is reliable for the customs.