(Hacker Techniques, Tools & Incident Handling, Third Edition) - Assessment Worksheet Applying Encryption and Hashing Algorithms for Secure Communications
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Lab Assessment Questions & Answers
1. Compare the hash values calculated for Example. txt that you documented during this lab. Explain in your own words why the hash values will change when the data is modified.
2. If you were to create a new MD5sum or SHA1sum hash value for the modified Example. txt file, would the value be the same or different from the hash value created in Part 3 of the lab?
3. If you want secure email communications without encrypting an email message, what other security countermeasure can you deploy to ensure message integrity?
4. When running the GnuPG command, what does the -e switch do? a. Extract b. Encrypt c. Export
5. What is the difference between MD5sum and SHA1sum hashing calculations? Which is better and why?
6. Name the cryptographic algorithms used in this lab.
7. What do you need if you want to decrypt encrypted messages and files from a trusted sender?
8. When running the GnuPG command, what does the -d switch do? a. Detach b. Destroy c. Decrypt
9. When creating a GnuPG encryption key, what are ways to create entropy?