I am looking into a proximity authentication system.

Our corporate rules state that PCs must go into
screen saver, requiring a password, whenever left
alone.

We have factory floor PCs that material handlers
have to use. They share a login since they all use
the same app, and do not need to switch between people.

But it is constantly timing out, which causes them
to relogin MANY times a day.

I want to be able to allow them to carry a badge that
identifies them, and run some application on the PC that
will allow them back in.


This company claims to have the solutions, but it
is insecure.
[link|http://www.pcprox.com|http://www.pcprox.com]
Their HID card reader simply stuffs the card ID into the
password field. And everyone knows what the card id id.

Dumb.

But stylistically, the access method makes sense.

A sonar sensor can tell when someone is near the computer,
and will lock it when people walk away. But we still need
something a bit more secure for the actual authentication.

Any ideas?

Prefer RFID though to ensure never have to touch the PC or keyboard unless it is part of the job.

But I still need the software that logs them in.