The Great Firewall of China is a national effort to protect Chinese corporate and state secrets and infrastructure from cyberattacks. The initiative is overseen by the Chinese Ministry of Public Security (MPS) and officially, the project is known as the Golden Shield. The Great Firewall is controversial because of fears that the Chinese government is using cybersecurity as justification for controlling what information the country's citizens can access. Sites that have been blocked by the Great Firewall include Facebook, Wikipedia, Twitter, the New York Times, and Google and its services -- including Youtube. The Great Firewall is possible because China controls the Internet gateways that stand between China and the rest of the Internet. Through a combination of firewalls and proxy servers at these gateways, the Chinese government is able to analyze and manipulate Internet traffic. Web sites blocked by the Great Firewall generally appear as though they are experiencing technical issues. An error code might say a page is not found (404 error), the connection needs to be reset or the page has timed out. In reality, the Great Firewall blocks and redirects internet traffic through a number of means, including cache poisoning, IP address black lists, deep packet inspection, resetting connections and blocking VPNs. Tech-savvy Chinese citizens have found creative ways to circumvent state censorship by using proxy servers and inventing new words for terms that are likely to be flagged in deep packet inspection. Continue reading... |
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