[ctdonath2]

Randomly generating numbers (to a quality of randomness suitable for encryption) is actually quite hard to do. Bias & patterns can be discerned in most "random number generators".

Digits of pi are actually & provably random (well, have all qualities of randomness by any definition other than being part of a particular number). If I pick an unspecified and unguessable portion of pi, and arbitrarily scramble those digits up, the result is indeed random.

Otherwise you're faced with...

[aquila48]

“If I pick an unspecified and unguessable portion of pi, and arbitrarily scramble those digits up, the result is indeed random.”

Couldn’t you do the same with randomly generated numbers. Start with that and then arbitrarily scramble them?

Actually it’s quite easy to implement cybersecurity. Simply limit the number of tries you’re allowed in a period of time.

If you’re odds of coming up with the correct key is one in a million, then waiting a day after every 10 bad guesses means it would take you on average 100,000 days - almost 300 years!

In other words it doesn’t really matter how fast a super computer you have. The time that it takes to decipher the code is dictated by the allowed interval between bad tries.