Hi,

I am trying to make a function that can generate an unlock code and
verify an unlock code. It doesnt have to be 100% secure just not easily
guessable. The twist is I have the following inputs:

serial number: 1234567
number of users: 100
password: test

FUNCTION MakeUnlockCode(lcSerials,lcUsers,lcPassword)
RETURNS unlockcode..

FUNCTION CheckUnlockCode(lcSerial,lcUnlockCode
RETURNS Number of users or 0

So the problem is what algorithm or concept can I use to
get the desired results above?