41753169079241_page_106

41753169079241 | page 106 | https://thedailydialectics.com/pdfs/FIOA/41753169079241/41753169079241.pdf

F MACHINE SYSTEMS ~ % INTRODUCTION }, Cryptossystema can be divided inte two cdtegoriés depending | on how the encipherment is performed, by hand or by machine. Hand ; systems are treated separately, and for purposes of this report machine systems are defined as those in which the key used is pro=…