And Rijndael?: Automatic Related-Key Differential Analysis of Rijndael

Loïc Rouquette, David Gérault, Marine Minier, Christine Solnon

Abstract: Finding optimal related-key differential characteristics for a given cipher is a problem that hardly scales. For the first time, we study this problem against the 25 instances of the block cipher Rijndael, which are the little brothers of the AES. To achieve this, we adapt and improve an existing approach for the AES which is based on Constraint Programming.