Intersection Attacks
A form of attack mostly affecting real time service anonymisation layers such as Tor or I2P. It can also affect Freenet-based real time services (e.g. Freekiwiki and Freemail may have such problems if they're not careful).
Basically it consists of looking at each node or computer that might be the originator, and observing its downtime and correlating that to the downtime of the service in question. Obviously creating downtime by attacking the computer in a subtle (or not so subtle) way will be a useful extension of this attack.
