Most of you have probably used Tor before, but I2P may be unfamiliar. Both are anonymization networks that allow people to obfuscate where their traffic is coming from, and also host services (web sites for example) without it being tied back to them. This talk will give an overview of both, but will focus on real world stories of how people were deanonymized. Example cases like Eldo Kim & the Harvard Bomb Threat, Hector Xavier Monsegur (Sabu)/Jeremy Hammond (sup_g) & LulzSec, Freedom Hosting & Eric Eoin Marques and finally Ross William Ulbricht/“Dread Pirate Roberts” of the SilkRoad, will be used to explain how people have been caught and how it could have been avoided.