Mollin, Richard A. <br/><br/>
Codes: the guide to secrecy from ancient to modern times 

 - Boca Raton  Chapman and Hall/CRC  2005 
 - xx, 679p. 
<br/><br/>   
<br/><br/><label>ISBN: </label>1584884703 
<br/><br/><label>Subjects--Index Terms: </label>Data encryption- history  Cryptography- history  Compuiter- access control  Computer security  Computer viruses  Computer crimes  Computers 
<br/><br/><label>Universal Decimal Class. No.: </label>004.056.55