Tor has become a tool of free expression in parts of the world where citizens can not speak freely against their government. On Tuesday, a number of users have noticed that Facebook is blocking connections from the Tor network.
Tor is a free tool that keeps Web browsing sessions private and anonymous. For activists and political dissidents who use the Internet to communicate with the outside world in countries where doing so is a crime, being unable to login to Facebook using TOR posed a huge problem.

Later, Facebook resolves the Tor issues and said that A high volume of malicious activity across Tor exit nodes triggered Facebook’s automated malware detection system, which temporarily blocked visitors who use the Tor anonymity service to access the social network.

The role that Tor and Facebook played in facilitating the dissemination of information under restrictive regimes cannot be underestimated. Security researchers are also frequent users of Tor, for instance to hide their location when investigating malicious activity on the Internet.

By giving people the power to share, we are starting to see people make their voices heard on a different scale from what has historically been possible. These voices will increase in number and volume. They cannot be ignored.

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