Nichols, Randall K. <br/><br/>
Classical cryptography course Vol.2 / 
Randall K. Nichols 
 - Vol-2 
 - USA  Aegean Park Press  1996 
 - 449p 
 -  2 .
<br/><br/>Polyalphabtic Substitution Systems (Page-1), Polyalphabtic Substitution Systems (Page-35), Aperiodic Systems (Page-69), Introduction to Cryptarithms (Page-99), Statistical Attacks (Page-123), Transportation (Page-152), Headlines Puzzles, Playfair, Four Square, Fractionation and Delastelle Systems (Page-203), Introduction to Cryptarithms (Page-251), Passwords, Privacy, Data Protection (Page-268), Codes and Code Systems (Page-292), Cipher Machines (Page-321). 
<br/><br/><label>ISBN: </label>0894122649 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography
<br/><br/><label>Dewey Class. No.: </label>005.82,NIC