【讲　题】Tor and censorship: lessons learned / Tor 与网络审查制度间的微妙关系
【主讲人】Roger Dingledine
　Roger Dingledine is project leader for The Tor Project, a US non-profit
　working on anonymity research and development for such diverse organi-
　zations as the US Navy and the Electronic Frontier Foundation. In addition
　to all the hats he wears for Tor, Roger organizes academic conferences on
　anonymity, speaks at a wide variety of industry and hacker conferences, and
　also does tutorials on anonymity for national and foreign law enforcement.
　* 主要专长：scalable secure systems, anonymity and privacy, cryptography
　　　　　　　and unobservability, civil liberties and human rights, and free
　　　　　　　software advocacy.
　* 联络方式：arma AT freehaven.net
　* 个人网页：http://www.freehaven.net/~arma/cv.html
【时　间】2011-03-29 (Tue.) 14:00-16:00
【地　点】中央研究院 资讯科学研究所 106 室
【主办单位】中研院 自由软件铸造场 (OpenFoundry) http://www.openfoundry.org/
【议程简介】
　Tor is a free-software anonymizing network that helps people around the
　world use the Internet in safety. Tor's 1800 volunteer relays carry traffic
　for several hundred thousand users including ordinary citizens who want
　protection from identity theft and prying corporations, corporations who
　want to look at a competitor's website in private, and soldiers and aid
　workers in the Middle East who need to contact their home servers without
　fear of physical harm. Tor was originally designed as a civil liberties
　tool for people in the West. But if governments can block connections to
　the Tor network, who cares that it provides great anonymity? A few years
　ago we started adapting Tor to be more robust in countries like China. We
　streamlined its network communications to look more like ordinary SSL, and
　we introduced "bridge relays" that are harder for an attacker to find and
　block than Tor's public relays. In the aftermath of the Iranian elections
　in June 2009, and then the periodic blockings in China, we've learned a
　lot about how circumvention tools work in reality for activists in tough
　situations. I'll give an overview of the Tor architecture, and summarize
　the variety of people who use it and what security it provides. Then we'll
　focus on the use of tools like Tor in countries like Iran and China: why
　anonymity is important for circumvention, why transparency in design and
　operation is critical for trust, the role of popular media in helping