Tor is an encrypted encrypted anonymizing network considered to be one of the most privacy oriented service and is mostly used by activists, journalists to circumvent online censorship and surveillance efforts by various countries. The new version disables SSL3 connections to prevent users against the “POODLE” attack. New transports that are intended to defeat the Great Firewall of China and other extremely restrictive firewalls. Tor is generally thought to be a place where users come online to hide their activities and remain anonymous.
Source: https://thehackernews.com/2014/10/privacy-tools-tor-browser-40-and-tails.html