TY  - GEN
AU  - Nichols, Randall K.
TI  - Classical cryptography course Vol.2
SN  - 0894122649
U1  - 005.82,NIC 
PY  - 1996///
CY  - USA
PB  - Aegean Park Press
KW  - Cryptography
N1  - 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)
ER  -