The problem of space of physically securing cash is more stable over time and better understood by non experts than the problem space of securing electronic pay

The problem of space of physically securing cash is more stable over time and better understood by non experts than the problem space of securing electronic payments: For example, the costs and benefits of "There is a new innovation in theft, people yank ATMs out of walls with trucks, which you can mitigate by putting up bollards" are easier to understand than "there is a buffer overflow in your logging software that is used everywhere". So yes, a bulletproof cage is security technology, it works sufficiently well most of the time, there aren't many low-effort innovations to break it (bombs and such have been around forever but aren't used to rob convenience stores often), and if it does get broken it's obvious. Whereas a software exploits can be harder to detect and can be much easier to replicate and scale Edit - Innovations in physical theft: That Kia/Hyundai car trend, which is really software. The trick bums use to steal blue bikes from docks. Writing threatening notes to bank tellers without any way of making good on the threat because tellers are directed to not fight back. Any more examples?