Arvind Narayanan (Ph.D. 2009) is an Assistant Professor of Computer Science at Princeton. He studies information privacy and security and has a side-interest in technology policy. His research has shown that data anonymization is broken in fundamental ways, for which he jointly received the 2008 Privacy Enhancing Technologies Award. Narayanan leads the Princeton Web Transparency and Accountability project that aims to uncover how companies are collecting and using our personal information. He also studies the security and stability of Bitcoin and cryptocurrencies.

Narayanan is an affiliated faculty member at the Center for Information Technology Policy at Princeton and an affiliate scholar at Stanford Law School's Center for Internet and Society. You can follow him on Twitter at @random_walker.

Joseph Bonneau is a Technology Fellow at the Electronic Frontier Foundation and Postdoctoral Researcher at Stanford University. In addition to researching Bitcoin and related cryptocurrencies he has worked on passwords and web authentication, secure messaging tools and HTTPS for secure web browsing. He received a PhD from the University of Cambridge under the supervision of Ross Anderson and an MS from Stanford under the supervision of Dan Boneh. Last year he was as a Postdoctoral Fellow at CITP, Princeton and he has previously worked at Google, Yahoo, and Cryptography Research Inc.

Edward W. Felten is Deputy U.S. Chief Technology Officer at the White House. He is on leave from Princeton University, where he is the Robert E. Kahn Professor of Computer Science and Public Affairs, and the founding Director of Princeton's Center for Information Technology Policy. In 2011-12 he served as the first Chief Technologist at the U.S. Federal Trade Commission. His research interests include computer security and privacy, and technology law and policy. He has published more than 100 papers in the research literature, and two books. His research on topics such as Internet security, privacy, copyright and copy protection, and electronic voting has been covered extensively in the popular press.

He is a member of the National Academy of Engineering and the American Academy of Arts and Sciences, and is a Fellow of the ACM. He has testified before the House and Senate committee hearings on privacy, electronic voting, and digital television. In 2004, Scientific American magazine named him to its list of fifty worldwide science and technology leaders.

Andrew Miller is a computer science PhD student at the University of Maryland, and previously received his M.S. degree from the University of Central Florida. He has studied cryptocurrencies since 2011, and has authored scholarly papers on a wide range of original research, including new proof-of-work puzzle constructions, programming languages for block chain data structures, and peer-to-peer network measurement and simulation techniques.

We are grateful to many students at Princeton University who helped us develop the course materials. Steven Goldfeder, Dillion Reisman, Shivam Agarwal, Alex Iriza, Pranav Gokhale, Miles Carlsten, Paul Ellenbogen, and Harry Kalodner deserve special thanks.