Trailrunner7 writes "China has long used the Internet's Domain Name Service to censor Web sites and information that the ruling Communist Party deems threatening. But now security experts warn that the government's censorship is in danger of spilling over China's borders, suppressing the ability of those living outside of China to find information online. An estimated 57% of all networks on Earth passed DNS requests through a Chinese DNS rootserver at some point in 2010, according to data from security firm Renesys. Tampering by the Communist Party there poses a danger to Internet security and freedom. In fact, DNS tampering may be a bigger threat than techniques like BGP (Border Gateway Protocol) hijacking, which is believed to be responsible for an unexpected shift in Internet routing in April that has recently been the subject of mainstream media reports in the US. There is already evidence that China's efforts to tamper with DNS have bled outside the country's borders. The same report to Congress from the US-China Economic and Security Review Commission that called attention to the BGP hijacking incident from April, 2010 also mentions a March, 2010 incident in which Internet users in the US and Chile attempted to connect to social networking websites banned by the Chinese government. However, their DNS requests were handled by a Beijing-based Domain Name Server, which responded with incorrect DNS information that directed the surfers to incorrect servers, the report says."