Jacob Appelbaum is a computer security consultant and developer and advocate for the Tor Project, a tool and privacy network which protects internet users’ privacy and security. At the Arab Bloggers Workshop he gave a presentation about circumvention, online security, and anonymity. He is @ioerror on Twitter.

Ahmad Gharbeia is an advocate of open source software and open content based in Cairo, Egypt. He frequently trains bloggers how to publish information securely and anonymously, and was part of the team that translated Tactical Technology Collective’s Security in-a-Box toolkit into Arabic. He is @agharbeia on Twitter.