The MOR cryptosystem and extra-special $p$-groups
  This paper studies the MOR cryptosystem, using the automorphism group of the extra-special $p$-group of exponent $p$, for an odd prime $p$. Similar results can be obtained for extra-special $p$-groups of exponent $p^2$ and for the even prime. 
Ayan Mahalanobis
math.GR cs.CR