The Diffie-Hellman Key Exchange Protocol and non-abelian nilpotent groups
arXiv:math/0602282
Abstract
In this paper we study a key exchange protocol similar to Diffie-Hellman key exchange protocol using abelian subgroups of the automorphism group of a non-abelian nilpotent group. We also generalize group no.92 of Hall-Senior table \cite{halltable}, for arbitrary prime and show that for those groups, the group of central automorphisms commute. We use these for the key exchange we are studying.
Finally got accepted. The final version. To appear, Israel Journal of Mathematics