News for hackers. Stuff that matters.
Re:Spain's hospital IT systems under “massive attack” (in Sp... by ancarda on Monday March 23, 2020 @01:07PM (#22666076)
Possibly GNU Taler? https://taler.net/en/features.html

However, I don't know enough about this system to know if this is what you're looking for.

Re:Spain's hospital IT systems under “massive attack” (in Sp... by amelius on Tuesday March 24, 2020 @02:23PM (#22677275)
Interesting but this usecase doesn't seem to be specifically addressed.