Internet censorship is the control or suppression of what can be accessed, published, or viewed on the Internet. The extent of Internet censorship varies on a country-to-country basis. While most democratic countries have moderate Internet censorship, other countries go as far as to limit the access of information such as news and suppress discussion among citizens. In countries such as North Korea, all websites are under government control. In Burma authorities filter e-mails and block access to sites of groups that expose human rights violations or disagree with the government. In Iran bloggers must register at the Ministry of Art and Culture. Those that express opposition to the mullahs who run the country are harassed and jailed.
China has the most rigid censorship program in the world. The government filters searches, block sites and erases “inconvenient” content, rerouting search terms to items favorable to the Communist Party.
Since 2013, Chinese officials have adapted a cybersecurity law to jail a wide range of people for online speech, including artists, essayists and liberal lawyers