Russia May Block Tor

In effort to combat child porn, Russian security forces consider installing filters preventing access to Tor networks. But experts say blocking the anonymizing service could be difficult.

As part of a bid to crack down on purveyors of child porn, could Russia block the anonymizing Tor network?
In fact, the head of the Federal Security Service (FSB) -- the Russian equivalent to the FBI -- is seeking changes to the countrys laws that would give his agency jurisdiction over child pornography investigations and allow him to put filters in place to actively block anyone who attempts to connect to anonymous Tor networks from inside Russia,
reported
Russian newspaper
Izvestia
.
That news emerged when Sergey Zhuk -- who runs the Head Hunters group, a Russian special interest group founded to combat child pornography -- wrote to the FSB requesting that it block all Tor sites on the grounds that they were being used to host the worlds largest collective child porn archive,
reported

Russia Today
.
Tor is short for the onion router, referring to the layers of encryption that are used to disguise the identity of someone browsing the Internet along with the pages theyre viewing. The service does that by routing requests through one of about 3,000 different relays.
[ Feds describe Anonymous as a shadow of its former self since LulzSec bust. Read
FBI: Anonymous Not Same Since LulzSec Crackdown
. ]
Tor is used to facilitate so-called darknets, which are reachable only when using Tors anonymizing software and feature pages that sport an .onion extension. While Tors anonymizing capabilities are used by activists and dissidents to combat authoritarian regimes, the functionality has also attracted
suppliers of illegal narcotics
, weapons traffickers and
child porn peddlers
.
But the
real-world hurdles
facing any law intelligence agency that might attempt to block Tor recall the famous aphorism from John Gilmore, who helped found the Electronic Frontier Foundation: The Net interprets censorship as damage and routes around it. For example, a study released last year noted that
China appeared to be blocking
most, if not all, Tor traffic inside the country. But researchers then identified new techniques for evading those blocks.
Similarly, Iran attempted to block all Tor traffic inside the country in 2011 by adding a filter to network border controls. But within 24 hours, the Tor Project had upgraded its Tor relay and bridge software to
route around the filters
.
Still, U.S. intelligence officials have suggested that in their effort to track traffic sent across Tor, theyre hosting a number of the Tor relays. According to the Tor Project, traffic is ideally routed across three relays, but
if any one is compromised
, someone might be able to glean sensitive information such as passwords or the identity of a user.
Tor also isnt immune to targeted takedowns. For example, many security experts suspect that an FBI sting operation, revealed earlier this month,
successfully disabled anonymity on Tor
for some users by targeting a vulnerability in the Tor Browser Bundle (TBB), which is based on Firefox 17 and is the easiest way for people to access Tors hidden services. According to one thesis, the bureau exploited the vulnerability to log the IP addresses of people associated with child pornography sites hosted using Tor, as part of an operation designed to locate and capture 28-year-old Eric Eoin Marques, who was ultimately arrested by police in Dublin. During a related extradition hearing earlier this month, an FBI official accused Marques of being the largest facilitator of child porn on the planet.
As that suggests, blocking Tor outright may not be in the best interests of law enforcement agencies. In fact,
Russia Today
-- which often advances a pro-Kremlin viewpoint -- reported that according to some security specialists, criminals relying on Tor often overestimated the protection provided by darknets.

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Russia May Block Tor