Earlier quoted context omitted.
>> The infrastructure of iris scanners and computers already exists in refugee camps (I'm genuinely curious) what kind of coverage across the globe are we talking about here? Things have obviously come a long way, it's not that long ago that the UNHCR was talking about "water, sanitation and hygiene". More infrastructure questions: does the system also require a working internet connection? If so, when the internet c…
If you're not working directly on the chain, because there's no internet connection, how do you deal with double-spending attacks?
Double-spends can only be securely verified once the transaction is processed on-chain but keeping track of nonces and signatures can be done with a secondary (off-chain) system which is easy to do with a limited population.
The Suntainers we built have WiFi and GSM included so that transactions can be relayed along the ground network.