Carnegie Mellon houses CERT, the Computer Emergency Response Team. Decades old, CERT's stated mission is "improving the security and resilience of computer systems and networks," and in that work they partner with "government, industry, law enforcement, and academia." In 2014, CERT reportedly carried an attack on the Tor network that lasted from January 30th to July 4th. (The following sequence of events come from Princeton Director of Princeton's Center for Information Technology Policy Ed Felten's timeline of the attack, published on July 31, 2014) The attack strategy including adding 115 new nodes to the network, which likely enabled the owners of those nodes to monitor Tor traffic in an unprecedented way. CERT researchers submitted an abstract on this style of attack and were scheduled to speak at the Black Hat hacker conference that year, before the presentation was canceled on account of the material not being cleared for release by Carnegie Mellon.