Equivalence of Generalised Feistel Networks

ePrint Report: Equivalence of Generalised Feistel Networks

Patrick Derbez, Marie Euler

This paper focuses on equivalences between Generalised Feistel Networks (GFN) of type-II. We introduce a new definition of equivalence which captures the concept that two GFNs are identical up to re-labelling of the inputs/outputs, and give a procedure to test this equivalence relation. Such two GFNs are therefore cryptographically equivalent for several classes of attacks. It induces a reduction of the space of possible GFNs: the set of the …

concept definition eprint report inputs networks procedure report test