https://peertube.eqver.se/videos/watch/62fe2a0a-407a-40a4-8ca3-a1b1d74f7abf A DEF CON 31 talk about reverse engineering Boston’s subway payment system. Four students analyzed the CharlieCard and discovered a way to ride for free. They explain how they studied the card hardware, analyzed the legacy payment system, and reconstructed its logic step by step. The talk also covers responsible disclosure to government authorities. It features custom-built tools — including a portable payment terminal — and introduces basic techniques for reverse engineering RFID cards and closed systems. Fri, 24 Jul 2026 11:34:21 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.eqver.se https://peertube.eqver.se/client/assets/images/icons/icon-512x512.png https://peertube.eqver.se/videos/watch/62fe2a0a-407a-40a4-8ca3-a1b1d74f7abf All rights reserved, unless otherwise specified in the terms specified at https://peertube.eqver.se/about and potential licenses granted by each content's rightholder.