Suppose I want to print a human readable 10 digit serial using ordinary day today printer but the printer is communal printer and manned. My intention is for the person manning the printer to not read the code.
Initial inputs that i know is that printer is not a copier and person manning does not have a camera or smartphone to make a copy. There is no message interception between the printer and the computer printing it.
My method to print is in such a way that the paper is to be folded which will make creases on the paper if an attempt was made by human to read the code thereby letting the end user know that the code secret is known by another human or an attempt was made to read the code. However before I go about programming the print function, I was wondering if there are any techniques or methods that may be already out there.
Added bonus would be if the print is not copyable.