3. (Email Security) Download and install a freeware PGP, then generate a pair of public and private keys, send the grader your public key generated by email. Then generate another email, sign it, and send the grader a copy of the signed email. Hint: go to gpg4win tool homepage (https://www.gpg4win.org/). What version of PGP are you legally allowed to download? given the country you are in.

4. (IP Security) If IPsec provides security at the network layer, why is it that security mechanisms are still needed at layers above IP?

5. (Wireless Security) Find at least five known security vulnerabilities in 802.11, and propose possible solutions to each of them.