Title	Modified Version of Playfair Cipher using Linear Feedback Shift Register
Author	Packirisamy Murali, Gandhidoss Senthilkumar
Citation	Vol. 8  No. 12  pp. 26-29
Keywords	Playfair cipher, Random number, Linear Feedback Shift Register, Polyalphabetic cipher

Title	Classification of Substitution Ciphers using Neural Networks
Author	G.Sivagurunathan, V.Rajendran, T.Purusothaman
Citation	Vol. 10  No. 3  pp. 274-279
Keywords	Cipher text, Classifier, Back propagation neural network, Playfair cipher, Hill Cipher, Vigen?re cipher

Title	Integrating Classical Encryption with Modern Technique
Author	Fauzan Saeed, Mustafa Rashid
Citation	Vol. 10  No. 5  pp. 280-285
Keywords	Network security, Playfair cipher, viginere cipher, Classical encryption, Modern Encryption

Title	Data Encryption and Hiding using Playfair and Complementary Techniques based on DNA Sequences
Author	Ahmed Elhadad
Citation	Vol. 22  No. 1  pp. 697-701
Keywords	DNA, Playfair, complementary technique, reference DNA, Playfair cipher.