https://sebnet.org/ctf-grehack16-writeup-hardware-phonecard-arduino.html

Write up for the hardware challenge "Phreak Me ! 1/2" 300 and "Phreak Me ! 2/2" 200.

Done by Lou & SebNet

Original writeup (https://sebnet.org/ctf-grehack16-writeup-hardware-phonecard-arduino.html).