▁which ▁became ▁the ▁NE MA ▁machine ▁which ▁was ▁put ▁into ▁service ▁after ▁World ▁War ▁II . ▁There ▁was ▁even ▁a ▁Japanese ▁developed ▁variant ▁of ▁the ▁En igma ▁in ▁which ▁the ▁rot ors ▁sat ▁hor izont ally ; ▁it ▁was ▁apparently ▁never ▁put ▁into ▁service . ▁The ▁Japanese ▁P UR P LE ▁machine ▁was ▁not ▁a ▁rot or ▁machine , ▁being ▁built ▁around ▁elect rical ▁ste pping ▁switch es , ▁but ▁was ▁concept ually ▁similar . ▁ ▁Rot or ▁machines ▁continued ▁to ▁be ▁used ▁even ▁in ▁the ▁computer ▁age . ▁The ▁K L - 7 ▁( AD ON IS ), ▁an ▁encryption ▁machine ▁with ▁ 8 ▁rot ors , ▁was ▁widely ▁used ▁by ▁the ▁U . S . ▁and ▁its ▁al lies ▁from ▁the ▁ 1 9 5 0 s ▁until ▁the ▁ 1 9 8 0 s . ▁The ▁last ▁Canadian ▁message ▁encrypted ▁with ▁a ▁K L - 7 ▁was ▁sent ▁on ▁June ▁ 3 0 , ▁ 1 9 8 3 . ▁The ▁Soviet ▁Union ▁and ▁its ▁al lies ▁used ▁a ▁ 1 0 - rot or ▁machine ▁called ▁F ial ka ▁well ▁into ▁the ▁ 1 9 7 0 s . ▁ ▁A ▁unique ▁rot or ▁machine ▁was ▁constructed ▁in ▁ 2 0 0 2 ▁by ▁Netherlands - based ▁Tat j ana ▁van ▁V ark . ▁This ▁unusual ▁device ▁is ▁inspired ▁by ▁En igma , ▁but ▁makes ▁use ▁of ▁ 4 0 - point ▁rot ors , ▁allowing ▁letters , ▁numbers ▁and ▁some ▁pun ctu ation ; ▁each ▁rot or ▁contains