Washington, D.C., could be a leader in the United States — and worldwide — in using technology to improve the lives of its residents and visitors. As a rapidly growing city with a diverse and highly educated population, the District is a leader in law, education, tourism and, of course, government. With this mass of […]
Archives for 2014
Bitcoin mining is NP-hard
October 27, 2014 by
This post is (mostly) a theoretical curiosity, but a discussion last week at CITP during our new course on Bitcoin led us to realize that being an optimal Bitcoin miner is in fact NP-hard. NP-hardness is a complexity classification used in computer science to describe many optimization problems for which we believe there is no algorithm […]
Four Fair Use Takeaways from Cambridge University Press v. Patton
October 23, 2014 by
The most important copyright and educational fair use case in recent memory (mine, at least) was decided by the Eleventh Circuit Court of Appeals last week. The case, Cambridge University Press v. Patton, challenged Georgia State University’s use of e-reserves in courses offered by the university. The copyrighted works at issue were scholarly books–i.e., a […]
POODLE and the fundamental market failure of browser security
October 20, 2014 by
Last week saw the public disclosure of the POODLE vulnerability, a practical attack allowing a network attacker to steal plaintext from HTTPS connections. In particular, this attack can be used to steal authentication cookies. It’s a bad vulnerability, and it particularly hurts because it should have been fixed long ago. It only affects the ancient SSL v3 protocol, which was […]
On the value of encrypting your phone
October 9, 2014 by
This is a true story. Yesterday my phone crashed, and it wouldn’t reboot. Actually it would do nothing but reboot, over and over, with a seemingly different error message every time. I tried all of the tricks available to a technically handy person, and nothing worked—I couldn’t get it out of the crash-reboot cycle. So […]
