TY BSc-IT - NS Unit 1 - Lec 4 - CRYPTOGRAPHY TECHNIQUES, Substitution, Transposition, Ceasar Cipher

The point discussed in this lecture:- 1. CRYPTOGRAPHY TECHNIQUES 1.1. Cryptography 1.2. Cryptanalysis 1.3. Cryptology 2. Basic Concepts ( terminology) 3. PLAIN TEXT AND CIPHER TEXT 3.1. Substitution Techniques 3.2. Transposition Technique 4. Techniques for transforming plain text to cipher text 5. Cipher 5.1. Classical Ciphers 5.1.1. Substitution Cipher 1- Monoalphabetic Cipher 2- Polyalphabetic Cipher 3- Polygram Cipher. 4- Homophonic Cipher. 5.1.2. Transposition Cipher 6. Ceasar Cipher Download notes from here:- https://drive.google.com/open?id=0B_0qcYrYEFTBTWN2U3V3NGNhbGc All other material by me @ this link:- https://drive.google.com/open?id=0B_0qcYrYEFTBWjVtbS0ydjJ1REU