Kindly go through link for study material
Module 1 to Module 3 : https://sites.google.com/view/trncsetutorials/final-year-be/information-security/notes-m1-to-m3?authuser=2
Module 4: https://sites.google.com/view/trncsetutorials/final-year-be/information-security/notes-m5?authuser=2
Module 5: https://sites.google.com/view/trncsetutorials/final-year-be/information-security/notes-m6?authuser=2
MU solved Examples: https://sites.google.com/view/trncsetutorials/final-year-be/information-security/mu-solved-examples?authuser=2
Practical References: https://sites.google.com/view/trncsetutorials/final-year-be/information-security/practicals?authuser=2
Cryptography and System Security
https://www.youtube.com/playlist?list=PLSIm6F6G8CqbTvKstfF9vV10CkvmI_zpQ