Note that the original gov proposal was shot down by the French CNIL (translates to ~ national comission for computing & freedom). The new one seems to be basic

Note that the original gov proposal was shot down by the French CNIL (translates to ~ national comission for computing & freedom). The new one seems to be basically a QR code only, so it basically can "run" on anything capable of showing a pixmap, albeit I am yet to understand what exactly it is.