I'm thinking along similar lines (including physical mailing of smartcards or something similar). I like building AGPL software and take on commercial work from

I'm thinking along similar lines (including physical mailing of smartcards or something similar). I like building AGPL software and take on commercial work from time to time. Maybe I should write an article ; ) Email is in my profile. EDIT check out upspin.io project it's written in go and has a lot of thought put in