In this final chapter, we will use the BeagleBone Black (BBB) to protect the last bastion of your online life: real-time chats. With your e-mail protected by GPG and your browsing protected by Tor, we'll use the software called Off-the-Record (OTR) to protect instant messaging chats. OTR addresses a weakness in the PGP threat model and we will give an overview of the OTR design objectives before building the project. We'll also consolidate all of your chat networks to be managed over an Internet Relay Chat interface, which will run on your BBB. While this project doesn't require any additional hardware other than the BBB, the cryptographic concepts and networking interactions are slightly more challenging than the previous chapters. At the end of this chapter and the book, you will have had exposure to and become familiar with the three most effective tools to protect your privacy online.

In this chapter, you will do the following: