Abstract

Research by the OpenNet Initiative shows that more than forty countries in the world, including the United States, China and Russia, engage in certain form of Internet filtering and censorship. While there are reasons to both support and oppose to Internet censorship, many tools are available to users who want to keep anonymous on the net or to bypass content filtering, with Tor being one of the most famous of them.

This talk first gives an overview of Internet censorship. Then the widely-used Internet anonymity tool, Tor, is introduced. Some features and design choices of Tor are analysed. Lastly, the benefits and concerns brought by censorship-resistance tools like Tor are discussed.