Then you might also like the fact that it can be implemented simply using transparent sheets: https://www.douglas.stebila.ca/teaching/visual-one-time-pad/ http

Then you might also like the fact that it can be implemented simply using transparent sheets: https://www.douglas.stebila.ca/teaching/visual-one-time-pad/ https://www.douglas.stebila.ca/teaching/visual-one-time-pad/ IIRC this is exactly how OTP was used by some spies during the Cold War. (My compsci teacher actually showed us an 'original' pair of sheets that encoded a Chinese character). Also shows it very neatly why reusing the sheet is a bad idea.