Bosworth, Bruce <br/><br/>
Codes Ciphers and Computers An Introduction to Information Security  

 - New Jersey :   Hayden Book Company,   c1982 
 - 239 p.  : ill 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography<br/>Data Security
<br/><br/><label>Dewey Class. No.: </label>001.5436  / BOS