1. Ball, J.: Hacktivists in the frontline battle for the internet.
https://www.theguardian.com/technology/2012/apr/20/hacktivists-battle-internet
2. Bédard, M.: The Underestimated Economic Benefits of the Internet. In: Regulation Series. The Montreal Economic Institute (2016)
3. van Blarkom, G.W., Borking, J.J., Olk, J.G.E.: PET: Handbook of Privacy and Privacy-Enhancing Technologies (2003)
4. The Tor Project: Tor.
https://www.torproject.org
5. JonDos Gmbh: Official Homepage of JonDonym.
https://www.anonym-surfen.de