41758709079784_page_43

41758709079784 | page 43 | https://thedailydialectics.com/pdfs/FIOA/41758709079784/41758709079784.pdf

7 . REF i agaieo : wae in a es ge we ons eet on eee one security devices and systems, and on automatic teleprinting systems. The days of hand-operated devices is over, and those of semi-automatic off-line erypto- graphic machines are drawing to a close. And, last to be mentioned, NSA crypto-…