Personally I would refrain from storing any kind of information regarding their username and/or password on their computer, instead try and store it all on the server. I would guess their serial is a good place to start. Quite frankly I'm not entirely sure what would be the best approach to create auto-login within MTA in terms of security. Preferably a salt that is randomly generated every time someone attempts to register, this way each user would have their own unique salt. If you do not a have a registered senior Clipper. You'll also want to make sure you use a salt when you store people's passwords. If you have a registered senior Clipper card you will be asked to provide the serial number while applying.

The MTA is committed to human and civil rights and advocates for quality public education in an. The MTA promotes the use of its members collective powers to advance their professional and economic interests. So there's also the possibility of their serial being changed if they change some of the hardware and thus the auto-login would cease to work. The Massachusetts Teachers Association is a member-driven organization, governed by democratic principles, that accepts and supports the interdependence of professionals and unionism. Then there's also the problem of the serial being generated as per your hardware (and IP I think?). Just click on a model to see the serial numbers and the years it was manufactured. Do note though, that the chance of this happening is extremely small (read this some while ago, it's very possible this might have changed since then). You could indeed use their serial to generate means of achieving secure auto-login, but I believe there is a small chance for users to have the same serial number.

How to change mta serial number