Practical Cryptology


Quiz 2 Sample Questions, Sructure and Reading Material
  • Date: Wed, October 17, 11:00 AM - 11:50 AM in class
  • Quiz 2 consists of 4 questions. Each Question 25 points
  • Material: Vigenere and Hill Cipher encryption and decryption ONLY
  • Reading Material:
  • Chapter 2: 2.7 and 2.3

In the Quiz you have to EXPLAIN your answer in detail.

Sample Questions

  1. Using the KEY MATRIX A
    22 13
    115

    Encrypt: yana

  2. Decrypt the message: THVE, which was encrypted using the key matrix A
    3 7
    910

  3. Using the KEY MATRIX A
    2 3
    56

    Encrypt: code

  4. Decrypt the message: WEZAHO, which was encrypted using the key matrix A
    2 3
    56

  5. Find an inverse of matrix A
    1 4
    811

  6. Encrypt: CODE using first Vigenere Cipher with key CAT and then apply Hill cipher with the key from problem 1
  7. Decrypt the message GQRD that was first encrypted by Hill cipher using matrix key from problem 2 and then encrypted using Vigenere Cipher with key GO

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