Task by Mikhail Driagunov (@aethereternity) · Par time: ~3 hrs

I found some strange access control system. It refuses to let me through because my social credit score is too low, but I managed to capture how my card communicates with the reader.

Your job is to create a dump of a valid passcard (with 31337 social score) and upload it here:

Card exchange capture: nearfield.txt

Added at 16:40: here you have a Mifare Classic 1K communication dump taken with a proxmark3 device. NXP Mifare datasheet might be handy.

Added at 18:30: additional reading for you: