41753169079241_page_110

41753169079241 | page 110 | https://thedailydialectics.com/pdfs/FIOA/41753169079241/41753169079241.pdf

wheels. Also thére mnat be a way of. insuring ‘a jong period before flis-sequence of key letters starts to repeat. 4, There are cipher machines which produce key through the use of'telephone selectors, others use commutators. There is a wide variety of methods of moving the eleménts of the machine,…