Update 2017-09-11: We have collected several hundred responses, so we are now closing the survey to begin data analysis. Thanks for your help! We are looking for volunteers for a study to improve the usability of Tor and onion services, but first some background: The Tor network is primarily known for client anonymity, that is, users […]
The Effect of DNS on Tor’s Anonymity
September 29, 2016 by
This blog post is joint work with Benjamin Greschbach, Tobias Pulls, Laura M. Roberts, and Nick Feamster. Counting almost two million daily users and 7,000 relays, the Tor network is the largest anonymity network operating today. The Tor Project is maintaining a privacy-enhanced version of the popular Firefox web browser—Tor Browser—that bounces its network traffic […]
Improving Bitcoin’s Privacy and Scalability with TumbleBit
September 13, 2016 by
Last week we unveiled TumbleBit, a new anonymous payments scheme that addresses two major technical challenges faced by Bitcoin today: (1) scaling Bitcoin to meet increasing use, and (2) protecting the privacy of payments made via Bitcoin. Our proof-of-concept source code and a pre-print of the latest version of our paper were both posted online […]
No silver bullet: De-identification still doesn't work
July 9, 2014 by
Paul Ohm’s 2009 article Broken Promises of Privacy spurred a debate in legal and policy circles on the appropriate response to computer science research on re-identification techniques. In this debate, the empirical research has often been misunderstood or misrepresented. A new report by Ann Cavoukian and Daniel Castro is full of such inaccuracies, despite its claims of “setting […]
Wickr: Putting the “non” in anonymity
June 2, 2014 by
[Let’s welcome new CITP blogger Pete Zimmerman, a first-year graduate student in the computer security group at Princeton. — Arvind Narayanan] Following the revelations of wide-scale surveillance by US intelligence agencies and their allies, a myriad of services offering end-to-end encrypted communications have cropped up to take advantage of the increasing demand for privacy from surveillance. […]
