Just tested this. Ok so it works. Very cool! Now chances of someone correctly guessing a permutation of three 3-digit numbers are 1 in 901^3 = 732 million, but

Just tested this. Ok so it works. Very cool! Now chances of someone correctly guessing a permutation of three 3-digit numbers are 1 in 901^3 = 732 million, but still, is that the only form of security ? I can call someone over the phone & give them my screen key ie. 3 3-digit numbers. Someone else can overhear that & also go to screenleap and enter those 3 numbers & suddenly my screen isn't private anymore...