As a practical matter, I don't think any countries restrict importation of software that might be in Debian, unless they also restrict its use. The only such circumstances I can think of have to do with pornography; in the UK, for example, customs will seize things that are on sale openly in London. But I don't expect there to be anything in the Debian main collection that would be objectionable on those grounds.
Both in the case of encryption and in the case of patents, the countries that restrict import also restrict use. Also, I am not sure it is useful to distinguish between "use-restricted" and "patent-restricted", given that the consequences would be the same. However, making the extra distinctions won't cause any harm if people want to do that.
