We know exactly how to do these things digitally. Many European countries have had stored-value payment schemes in the 90s. Japan still does today.
It's a completely solved problem, but it's a more complex (and as such more expensive) solution than just assuming ubiquitous connectivity and a backend that never goes down, which is how we got to where we are.
> Is this motivated by a need to prepare for war?
Preparing for cyberattacks seems like a prudent move, no matter the adversaries' motivation. But yes, the context here is pretty obvious in Europe.
It's a completely solved problem, but it's a more complex (and as such more expensive) solution than just assuming ubiquitous connectivity and a backend that never goes down, which is how we got to where we are.
> Is this motivated by a need to prepare for war?
Preparing for cyberattacks seems like a prudent move, no matter the adversaries' motivation. But yes, the context here is pretty obvious in Europe.