How to encode a large number of digital input signals into a signal result

I would like to know how I can detect simultaneous pulses on several wires. Essentially I will have several wires that will serve as connection points when pressed upon. A simple visualtization of this is if you were to view several wires draped over (but not touching) a metal plate. The plate would be connected to the negative end of the battery & the wires would be connected to the positive end of the batter. When touched, the wire will hit the plate & pulse. Initially I was thinking something like a 64-6 encoder, but I now I feel that there are much better solutions.

So, in short, what is the best way 'hardware' to encode 2^n into n data lines.

Any help is appreciated!