RFID Replaying with the Proxmarx3

This post demonstrates the use of a Proxmarx3 RFID device for physical penetration testing by cloning and replaying an access card, validating that the replay is logged as the original card by a facility’s system. It provides step-by-step usage instructions, then evaluates low-cost shielding methods, finding that an aluminum wallet and tin foil hinder successful reads. The article concludes by recommending the tool for physical assessments while noting it is a high-level overview.