Are "MIFARE-compatible" contactless cards not playing fair? That's what you may wonder after @npub1g7yr...jmgp spotted some odd behavior. Curiosity led to experiments that resulted in devising a new attack technique that uncovered some backdoors, and here we are 🙀 The RFID hacking spirit lives on!

MIFARE Classic: exposing the static encrypted nonce variant... and a few hardware backdoors - Quarkslab's blog

We studied the most secure static encrypted nonce variant of "MIFARE Classic compatible" cards -- meant to resist all known card-only attac...