"In the shadowy world of electronic surveillance, tactics used by law enforcement agencies are rarely revealed. But now an international protocol about how to best monitor and track people online has been disclosed for the first time—offering a unique insight into covert police methodology."
The UN Office on Drugs and Crime has just released a report which details a protocol for tracking suspects online.
These include: "first, by obtaining data and “cookies” stored by websites like Facebook, Google, eBay and Paypal; second, by obtaining location data from servers used by VoIP Internet phone services (like Skype); then, by conducting a “smart analysis” of these data before moving on to the most serious and controversial step: intercepting communications, exploiting security vulnerabilities in communications technologies for “intelligence-gathering purposes,” and even infecting a target computer with Trojan-horse spyware to mine data."
These methods are usually considered secret so it is unusual that they have been published in this UN report.