Homeworks

1. Homework 1
   • Homework 1. The relevant files for the final question are the ciphertext, the encryption algorithm, and the decryption algorithm. Here is an additional ciphertext encrypted using the same key.
   • Homework 1 solutions. Programs for determining the period and finding a character of the key are also available.
2. Homework 2
   • Homework 2. The relevant files for the final question are the seven ciphertexts (one per line), and the encryption code.
   • Homework 2 solutions.
3. Homework 3
   • Homework 3.
   • Homework 3 solutions.
4. Homework 4
   • Homework 4. The relevant files for the first question, including a README file explaining them, are here .
   • Homework 4 solutions.
5. Homework 5
   • Homework 5. The relevant file for the last question is here.
     New: download these files and test your attack remotely.
   • Homework 5 solutions.
6. Homework 6
   • Homework 6.
   • Homework 6 solutions.
7. Practice problems about public-key encryption.