This challenge was made by Nahim (naam) El Atmani in 2016 in the context of the LSE CTF
Ref: https://ctf.lse.re/challenges#White%20Magic-13
target
contains the original challenge and instructions how to use it. The solution (the key to recover) is not provided because the CTF is still running, but has been found ;)traces
contains explanations on how to acquire a visual trace and snapshots.