[drangundsturm]

Well the bank could give you a little thumb drive with enough random numbers on it that it would work fine for you.

Except that the bank's computers would be hacked so the theives would have both sets of numbers.

[Reeses]

Except that the bank's computers would be hacked so the theives would have both sets of numbers.

If they get into the bank's computers they can put any numbers they want on any account. You won't be of any concern to them.

Money is mostly just information, magnetic bits on a disk somewhere. Someone can steal the bits but the bank should be able to recreate your money for you from backups.