Class 2: Introduction to Modern Cryptography by Professor Avishek Adhikari, Presidency University

In this talk we discussed about few terms related to Cryptography. I also discussed few old historical ciphers such as Cesarean Cipher, Affine Cipher, Substitution Ciphers etc and how they can attacked by using simple mathematical tools like group, inversion of elements in a group, permutation group, frequency analysis etc. Currently I am following the Chapter 12 of my book: Adhikari M R and Adhikari A: Basic Modern Algebra with Applications, Springer, 2014. https://www.springer.com/gp/book/9788132215981 If you have any queries, you may send me email at avishek.maths@presiuniv.ac.in