Darknets/Cipherspaces such as Tor and I2P have been covered before in great detail. Sometimes it can be hard to follow attack strategies that have been used against them as the papers written on the topic have been academic and abstract. What this talk will attempt to do is step back and give an overview of the topic in a manner hopefully more conducive to the understanding of security practitioners, giving more concrete examples.
While little to nothing in this talk will be "new and groundbreaking" it should lead to a better understanding of how encrypted anonymizing networks can be subverted to reveal identities.
For more information visit: http://bit.ly/defcon19_information
To download the video visit: http://bit.ly/defcon19_videos
Playlist Defcon 19: http://bit.ly/defcon19_playlist
Speaker: Adrian Crenshaw "Irongeek" Tenacity Institute and Irongeek.com