Meanwhile, here in South Africa, our intrepid criminals are making their own simcards, by the bucketload..<p><a href="https://www.citizen.co.za/sandton-chronicle/news-headlines/local-news/2024/06/17/counterfeit-sim-card-factory-busted-in-sandton/" rel="nofollow">https://www.citizen.co.za/sandton-chronicle/news-headlines/l...</a><p>For fun - Put that phrase in Google. "No chill in Mzanzi"
When thinking about offline currency and simcards we identified the following:<p>verifiable centrally issued identifier printed on card and can be verified by inserting into any phone<p>coin-like small physical tokens<p>offline verification processes could be as simple as a distributed poster with whitelisted id's<p>distributed and decentralized bootstrapping based on trust in accepted id's.
As you know this is imho a cool idea.
I'm thinking, what hinders the barista in usecase 1 from using the received simkojn in the cash register?<p>Isn't some sort of removal of cards from the list necessary?<p>Maybe I'm missing something...