I was tricked by a phone-phisher pretending to be from my bank, and he convinced me to hand over my credit-card number, then did $8,000+ worth of fraud with it before I figured out what happened.
I was tricked by a phone-phisher pretending to be from my bank, and he convinced me to hand over my credit-card number, then did $8,000+ worth of fraud with it before I figured out what happened.
PSTN is easy for surveillance to be just replaced with a modern system.
It is also relied on by business models of many things, like WhatsApp and Telegram and what not.
The something you are talking about seems suspiciously similar to the Internet with cryptographic IDs.