00933 a2200205 4500 Nust 20230216113840.0 0894122649 Nust 005.82,NIC Nichols, Randall K. 109134 Classical cryptography course Vol.2 / Randall K. Nichols Vol-2 USA Aegean Park Press 1996 449p 2 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). Cryptography BK ddc 176187 176187 0 0 ddc 0 0 MCS MCS GEN 2016-12-12 005.82,NIC MCS22700 2016-12-08 2016-12-12 BK Almirah No.71, Shelf No.2