SECTION 1:

MD5 hash string for Example.txt;

contents of Example.txt.md5 file;

SHA-1 hash string for Example.txt;

contents of Example.txt.sha1 file;

new MD5 hash string;

new SHA-1 hash string;

contents of the /home/student folder;

contents of the /home/instructor folder;

students public key ring;

contents of the encrypted file;

contents of the decrypted cleartext.txt.gpg file;

SECTION 2:

contents of the Examples.txt.md5 file;

contents of the Example2.txt.sha256 file;

modified MD5sum and SHA256 hash strings;

instructors public key ring;

students public key ring;

contents of the decrypted cleartext2.txt.gpg file;

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?