Quote:
Originally Posted by 2ndgenz28
So for $5 they send you a 99cent kids toy that spits out a 4 digit random code when ever the button is pushed.
How does it know its right?
They must be pre programed with a master key of such ehy, to where it can't spit out a bad code?
Even if ya pushed it a bunch of times on accident or purpose so you skipped using some codes, it don't care?
Id buy it for $5 if its dummy proof. Don't want to be denied buying something in line like a deadbeat  |
The button on the key doesnt generate the code, it only displays it for that time stamp. if you keep pressing the button the code doesnt change untill the programmed time changes. So what it does it both the key fob and the database are programmed with the same algorithm based on when the codes should refresh.
I dont know what the refresh times are on these, it could be when the code is used up it generates a new one, or based on an hourly/daily function. So if you dont press the button you wont see anything on the screen, probably to save the battery life on the unit. Once you press the button, the key is displayed and you enter it on the site. The database checks that the key is the correct one for that time stamp and then gives you access to your account.