This challenge was made by Jean-Baptiste Bédrune for Hack.lu 2009.
Ref: http://2009.hack.lu/index.php/ReverseChallenge
target
contains the original challenge and instructions how to use it, as well as the solution (the key to recover).traces
contains explanations on how to acquire a visual trace and snapshots used in the tutorial.DCA
contains the DCA attack against this challenge.
See the projet wiki for the corresponding tutorial.