I know you can get the parts to make a magnetic reader for around 40 to 60 dollars. I also know (from reading 2600 mag) that you can access the magnetic strip of your credit card and rewrite the data inside it. I think it is possible to get the magnetic reader to communicate with your keyboard if you solder them together. Given this, it is possible to make a security card access system to something like a door? Disowned, what the hell do you mean by card access system? Well, I mean is basically a security that revolves around your card as the key to unlock that system. Maybe I'm not explaining it correctly but someone out there has to know what I am talking about.