Assignment task: Encode a message using DES. Try the following experiments and note how they change the output:
1. Change one character at the end of the message. How much of the encoded message changes?
2. Change one character at the beginning of the message. How much of the encoded message changes?
3. Delete one character at the end of the message. How much of the encoded message changes?
4. Change one character in the key. How much of the encoded message changes?
5. Decrypt a message using a key with one character changed. Does it look anything like the original?