The problem with a true OTP solution is not generating the random bytes. It really isn’t. There are many many ways to do it, that are well documented. Pretty mu

The problem with a true OTP solution is not generating the random bytes. It really isn’t. There are many many ways to do it, that are well documented. Pretty much all modern phones and many (most?) computers in the last 5 to 10 years have hardware rngs, and can generate true random values very fast compared to the old “sample some part of the computer” mechanisms while also being much more robust. The problem is a true OTP requires both sides to have access to the same stream of random, and they must have enough for all messages. You can’t do that online, because transmitting the random key stream would require it’s own random key stream that was at least as long. That’s why OTP are impractical.