Computer_Security_User_Authentication

This is Assignment 2 of Computer Security Module and contains multiple simple exercises to demonstrate the following:

1. Week17 - This week covers some password cracking exercises
2. Week18 - This week covered some exercises about different methods of user authentication
3. Week19 - This week covers exercises which are beyond user authentication, including Message Authentication with HMAC (Hash-based message authentication code),Needham Schroeder Protocol, Demonstrating an attack on Needham Schroeder Protocol
4. Week20 - This week covers setting Linux file and folder permissions.

The Code

This code is written in Python 3.10 (using PyCharm IDE)

Running The Code

*To run the code, open the terminal and go to the directory where the code resides and run the code files individually. For example to run W17Q1.py python W17Q1.py

*The files are self-contained and all necessary libraries are imported.

What is in the code

The code is dividing into two parts:

Part1 - contains exercises demonstrating simple user authentication, password cracking exercises. (For more information , check the attached weekly brief). Part 2 - contains an advanced exercise which is Fixing Needham-Schroeder protocol to save from Replay attacks by introducing timestamp and extra nounces to verify users.

A log book CO876-as2634-CW2 is also attached which describes how I did each exercise