Defense Advanced Research Projects Agency, ARPANET and the Origins of Internet. https://www.darpa.mil/about-us/timeline/arpanet/, (accessed 05 September 2017).
World Wide Web Foundation, History of the Web. https://webfoundation.org/about/vision/history-of-the-web/, (accessed 05 September 2017).
Dailymail, Number of websites hits a BILLION: Tracker reveals a new site is registered every second. http://www.dailymail.co.uk/sciencetech/article-2759636/Number-websites-hits-BILLION- counting-Tracker-reveals-new-site-registered-SECOND.html/, 2014 (accessed 01 September 2017).
G. Hurlburt, Shining Light on the Dark Web, Computer, IEEE Computer Society. 50 (2017) 100-105. https:// 10.1109/MC.2017.110/.
Download Tor Browser. https://www.torproject.org/projects/torbrowser.html.en/, 2018 (accessed 05 September 2017).
Tor Project: Anonymity Online. https://www.torproject.org/, 2018 (accessed 05 September 2017).
The Invisible Internet Project (I2P). https://geti2p.net/, 2018 (accessed 05 September 2017).
M. Owen, Fun with onion routing, Network Security. 2007(4) (2007) 8-12. https://doi.org/10.1016/S1353-4858(07)70044-2/.