Lup Yuen Lee 李立源 on Nostr: "FM11RF08S chip by Shanghai Fudan Microelectronics was thought to be the most secure ...

"FM11RF08S chip by Shanghai Fudan Microelectronics was thought to be the most secure implementation of MIFARE Classic ... However, we have demonstrated various attacks, uncovered the existence of a hardware backdoor and recovered its key"

https://blog.quarkslab.com/mifare-classic-static-encrypted-nonce-and-backdoors.html