This repository contains assignment submissions made in the course CS641 (2022-23 II Sem.) at IIT-K in a team of three (Priya "priyagole" Gole, Shrilakshmi "shrilakshmisk" S K and me, Aditya "cliche-niche" Tanwar).

The solutions (only the commands used) for each assignment have been provided in Solutions. A brief overview of each assignment has been given below:

• Assignment 1: Substitution ciphers
  Awarded 43/50

  • -2 for not mentioning Monoalphabetic
  • -5 for not mapping punctuation marks to themselves

• Assignment 2: Vigenere cipher
  Awarded 65/65

• Assignment 3: Substitution Permutation Network
  Awarded 48/50

  • -2 for not mentioning block length

• Assignment 4: 6-round DES
  Awarded 95/100

  • -5 for not mentioning number of pairs required
    

  Remark: Code is not complete since the team could not break this assignment.

• Assignment 5: AES variant
  Awarded 100/100