http://g7ejphhubv5idbbu3hb3wawrs5adw7tkx7yjabnf65xtzztgg4hcsqqd.onion/html/defcon-23/dc-23-workshops-schedule.html
This workshop covers how physical access control systems work from the ground up including architecture, common policy, and components. We'll deep dive into the world of RFID starting with raw data analysis via oscilloscope and move on to access card technology data structures and formats.