Federal'naya Sluzhba Bezopasnosti ( Federal Security Service) The Federal Security Service, previously known as Federal Counterintelligence Service (FSK) is one of the successors of the KGB. It is a 75.000-person agency, headquarterd in the Lubyanka.

The FSB is allowed to open mail, tap telephones, monitor other forms of communication, and enter a private residence. (with court permisson, of course...)

SORM empowers the FSB to monitor all the internet traffic in Russia.

fas.org is cool