How do you make a random number generator? Answered

Random number generators are readily available for download all over the net for free. Here is just one I saw at CNET.com.

Search Google for many others.

My old digital watch has a random number generator.
Problem with many security devices is that they usually limit how many times you can try a number , then they lock you out.
Spy movies are not based on fact mostly. Watch some of the movie busting episodes of Myth Busters. The sad thing is that a lot of people accept them as fact rather than the fiction that they are.

It makes no sense to work with random numbers. You should define a minimum, a maximum and probably the number of digits. Then run a loop over the entire range and try with each generated number.
Batch code:

@echo off &setlocal enabledelayedexpansion
set min=0
set max=500
set digits=5

set "zeros="
for /l %%i in (1,1,%digits%) do set "zeros=0!zeros!"
for /l %%i in (%min%,1,%max%) do (
  set num=%zeros%%%i
  call :proc !num:~-%digits%!
)
pause
goto :eof

:proc
REM Your stuff here. You have to work with %1.
echo %1
goto :eof

Crack a keypad -

1. Spray with product that reacts with sweat (luminol may do)

2. Illuminate with UV light

The keys used will shine out.

You'd still have to punch the numbers into the keypad though?
If you can try as many times as you like these things can be unlocked. The problem is how long you've got for trying...

%RANDOM%

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