Mifare Classic Key A

Projects
1

Good morning everyone. I have this MIFARE Classic RFID card that I would like to clone. I know everything, but I don’t know key A. Is there anything I can do to recover it? I’ve done some research online and read about the Proxmark3 or similar. Would I be able to discover it with 100% certainty?

Screenshot_2025-12-18-22-33-38-51_95b7d1e8510fa3032a240bd8b4b39632
Screenshot_2025-12-18-22-33-38-51_95b7d1e8510fa3032a240bd8b4b396321080×2400 398 KB

Screenshot_2025-12-19-23-33-58-32_95b7d1e8510fa3032a240bd8b4b39632
Screenshot_2025-12-19-23-33-58-32_95b7d1e8510fa3032a240bd8b4b396321080×2400 329 KB

2

given MCT does not have your card’s keys known to it, you would need a proxmark, that would certainly recover all the keys and allow you to clone it.

2 Likes
3

Did you run with both keyfiles selected?

2 Likes
4

Yes

1 Like
5

I Need a proxmark3 Easy?

6

yes

3 Likes