▁ 5 0 9 ▁parts . ▁ ▁A ▁software ▁implementation ▁of ▁a ▁rot or ▁machine ▁was ▁used ▁in ▁the ▁crypt ▁command ▁that ▁was ▁part ▁of ▁early ▁UN IX ▁operating ▁systems . ▁It ▁was ▁among ▁the ▁first ▁software ▁programs ▁to ▁run ▁af oul ▁of ▁U . S . ▁export ▁reg ulations ▁which ▁class ified ▁crypt ographic ▁implementations ▁as ▁m un itions . ▁ ▁List ▁of ▁rot or ▁machines ▁ ▁B ID / 6 0 ▁( Sing let ) ▁ ▁Com b ined ▁Ci pher ▁Machine ▁ ▁En igma ▁machine ▁ ▁F ial ka ▁ ▁H ag elin ' s ▁family ▁of ▁machines ▁including ▁the ▁C - 3 6 , ▁the ▁C - 5 2 ▁the ▁CD - 5 7 ▁and ▁the ▁M - 2 0 9 ▁ ▁He bern ▁rot or ▁machine ▁ ▁H X - 6 3 ▁ ▁K L - 7 ▁ ▁Lac ida ▁ ▁Lor enz ▁S Z ▁ 4 0 / 4 2 ▁ ▁M - 3 2 5 ▁ ▁Mercur y ▁ ▁NE MA ▁ ▁O MI ▁crypt ograph ▁ ▁Por tex ▁ ▁R ED ▁ ▁S iem ens ▁and ▁H als ke ▁T 5 2 ▁ ▁S IG AB A ▁ ▁S IG C UM ▁ ▁Type x ▁ ▁References ▁ ▁Friedrich ▁L . ▁B auer , ▁" An ▁error ▁in ▁the ▁history ▁of ▁rot or ▁encryption ▁devices ", ▁C rypt ologia ▁ 2 3 ( 3 ), ▁ ▁July ▁ 1 9 9 9 , ▁page ▁ 2 0 6 . ▁ ▁Ci pher ▁A . ▁De