I'm currently carrying out a differential attack on the FEAL-4 algorithm, however I have hit a bit of a wall. Basically I attacked the final round first ($K3$) using the differential characteristic ...
I am having a difficult time related to differential analysis; more specifically, I have a problem understanding how to find a solution to the key of a 3 round DES toy cipher. As you might have ...
Given an arbitrary SPN-based cipher with X rounds. How to find an impossible differential for this cipher? What are strategies to find one?