One of the most common credentials is also the most confusing. How exactly do proximity cards 'read' into an electronic access system? Despite being widely used by more than a half-dozen 'contactless credential' types, that these credentials use nothing more than a simple wave in front of a reader can discount just how complex the process is. In this note, we look at 'proximity credentials', how they work, and the technology behind them.
What is 'Prox'