Quantum random numbers

Quantum random numbers

The point of using random numbers for cryptography is that they are unknown to the attacker, who must then do a search across an impossibly large space to find them. Using numbers downloaded from an Internet server means that your random numbers may well be known to the attacker, as the attacker has simply copied all of them. The data rate of the ANU system makes this unlikely to succeed, but it isn't too hard to choose the right moment to copy a limited amount of that random data.