information:extraction, linguistic:voice_change, information:classification, quality:corruption
Internet

Internet censorship is control or suppression of the publishing or accessing of information on the Internet. It may be carried out by governments or by private organizations either at the behest of the government or on their own initiative. Individuals and organizations may engage in self-censorship on their own or due to intimidation and fear.

The issues associated with Internet censorship are similar to those for offline censorship of more traditional media. One difference is that national borders are more permeable online: residents of a country that bans certain information can find it on websites hosted outside the country. Thus censors must work to prevent access to information even though they lack physical or legal control over the websites themselves. This in turn requires the use of technical censorship methods that are unique to the Internet, such as site blocking and content filtering.

Furthermore, the Domain Name System (DNS) a critical component of the Internet is dominated by centralized and few entities. The most widely used DNS root is administered by the Internet Corporation for Assigned Names and Numbers (ICANN). As an administrator they have rights to shut down and seize domain names when they deem necessary to do so and at most times the direction is from governments. This has been the case with Wikileaks shutdowns and name seizure events such as the ones executed by the National Intellectual Property Rights Coordination Center (IPR Center) managed by the Homeland Security Investigations (HSI). This makes it easy for internet censorship by authorities as they have control over what should or should not be on the Internet. Some activists and researchers have started opting for alternative DNS roots, though the Internet Architecture Board (IAB) does not support these DNS root providers.

Unless the censor has total control over all Internet-connected computers, such as in North Korea or Cuba, total censorship of information is very difficult or impossible to achieve due to the underlying distributed technology of the Internet. Pseudonymity and data havens (such as Freenet) protect free speech using technologies that guarantee material cannot be removed and prevents the identification of authors. Technologically savvy users can often find ways to access blocked content. Nevertheless, blocking remains an effective means of limiting access to sensitive information for most users when censors, such as those in China, are able to devote significant resources to building and maintaining a comprehensive censorship system.

Views about the feasibility and effectiveness of Internet censorship have evolved in parallel with the development of the Internet and censorship technologies:

A BBC World Service poll of 27,973 adults in 26 countries, including 14,306 Internet users, was conducted between 30 November 2009 and 7 February 2010. The head of the polling organization felt, overall, that the poll showed that:

The poll found that nearly four in five (78%) Internet users felt that the Internet had brought them greater freedom, that most Internet users (53%) felt that "the internet should never be regulated by any level of government anywhere", and almost four in five Internet users and non-users around the world felt that access to the Internet was a fundamental right (50% strongly agreed, 29% somewhat agreed, 9% somewhat disagreed, 6% strongly disagreed, and 6% gave no opinion).