Project 5-4: Encrypt E-Mail Messages In this project you will send and receive encrypted e-mail messages.

Required for this project:

Windows Vista, 7, or 8; Apple Mac OS X

Administrative access to the operating system for purposes of installing software

Obtain a copy of GnuPG (GPG), the freeware version of PGP. You can obtain it from http://www.gnupg.org/.

Install GnuPG on your system. Find another person who will do the same on another system, so that you can exchange messages.

Create a private-public key pair, per the instructions. See Figure 5-14.

Figure 5-14. Source: GnuPG Creating a public-private key pair using GnuPG

Send your public key to another person. Have the other person send his or her public key to you.

Import the other persons public key using the Keys>Import command. See Figure 5-15.

Figure 5-15. Source: GnuPG Importing a public key using GnuPG

Using your local e-mail program (Outlook, etc.) create an encrypted e-mail message. Alternately, encrypt a file using the other partys public key. Have the other person encrypt a file or message with your public key. Send the encrypted files/messages to each other.

Open the message/file sent from the other person. What are your observations?

If available, have a third person encrypt a file with his or her public key and send it to you. Try to open the file. What are your observations?