1. Multiple choice questions:

• a. What is ciphertext?
• i. Encrypted data
• b. What is plaintext?
• Unencrypted data
• c. What is decryption?
• iv. Retrieving the original message

2. Computationally secure encryption is achieved when an encryption method will take the attacker a very long time (more than a lifetime) to crack the message using the best existing technology.

3. It would be necessary to use an internal communication software such as Outlook that encrypts messages.

4. The Blowfish method because it uses larger keys.

5. There are many possible answers

6. There are many possible answers