China censors both the publishing and viewing of online material. Many controversial events are censored from news coverage, preventing many Chinese citizens from knowing about the actions of their government, and severely restricting freedom of the press. China's censorship includes the complete blockage of various websites, apps, video games, inspiring the policy's nickname, the "Great Firewall of China", which blocks websites. Methods used to block websites and pages include DNS spoofing, blocking access to IP addresses, analyzing and filtering URLs, packet inspection, and resetting connections.
Pixelization or mosaic processing is any technique used in editing images or video, whereby an image is blurred by displaying part or all of it at a markedly lower resolution. It is primarily used for censorship. The effect is a standard graphics filter, available in all but the most basic bitmap graphics editors.
The Great Firewall is the combination of legislative actions and technologies enforced by the People's Republic of China to regulate the Internet domestically. Its role in internet censorship in China is to block access to selected foreign websites and to slow down cross-border internet traffic. The Great Firewall operates by checking transmission control protocol (TCP) packets for keywords or sensitive words. If the keywords or sensitive words appear in the TCP packets, access will be closed. If one link is closed, more links from the same machine will be blocked by the Great Firewall. The effect includes: limiting access to foreign information sources, blocking foreign internet tools and mobile apps, and requiring foreign companies to adapt to domestic regulations.
Internet censorship in Australia is enforced by both the country's criminal law as well as voluntarily enacted by internet service providers. The Australian Communications and Media Authority (ACMA) has the power to enforce content restrictions on Internet content hosted within Australia, and maintain a blocklist of overseas websites which is then provided for use in filtering software. The restrictions focus primarily on child pornography, sexual violence, and other illegal activities, compiled as a result of a consumer complaints process.
The Chinese Wikipedia is the written vernacular Chinese edition of Wikipedia. It is run by the Wikimedia Foundation. Started on 11 May 2001, the Chinese Wikipedia currently has 1,415,184 articles and 3,501,061 registered users, of whom 63 have administrative privileges.
A wordfilter is a script typically used on Internet forums or chat rooms that automatically scans users' posts or comments as they are submitted and automatically changes or censors particular words or phrases.
Redaction or sanitization is the process of removing sensitive information from a document so that it may be distributed to a broader audience. It is intended to allow the selective disclosure of information. Typically, the result is a document that is suitable for publication or for dissemination to others rather than the intended audience of the original document.
Censorship in the People's Republic of China is mandated by the PRC's ruling party, the Chinese Communist Party (CCP). It is one of the strictest censorship regimes in the world. The government censors content for mainly political reasons, such as curtailing political opposition, and censoring events unfavorable to the CCP, such as the 1989 Tiananmen Square protests and massacre, pro-democracy movements in China, the persecution of Uyghurs in China, human rights in Tibet, Falun Gong, pro-democracy protests in Hong Kong, and aspects of the COVID-19 pandemic. Since Xi Jinping became the general secretary of the Chinese Communist Party in 2012, censorship has been "significantly stepped up".
Censorship in Turkey is regulated by domestic and international legislation, the latter taking precedence over domestic law, according to Article 90 of the Constitution of Turkey.
Multiple forms of media including books, newspapers, magazines, films, television, and content published on the Internet are censored in Saudi Arabia.
Internet censorship is the legal control or suppression of what can be accessed, published, or viewed on the Internet. Censorship is most often applied to specific internet domains but exceptionally may extend to all Internet resources located outside the jurisdiction of the censoring state. Internet censorship may also put restrictions on what information can be made internet accessible. Organizations providing internet access – such as schools and libraries – may choose to preclude access to material that they consider undesirable, offensive, age-inappropriate or even illegal, and regard this as ethical behavior rather than censorship. Individuals and organizations may engage in self-censorship of material they publish, for moral, religious, or business reasons, to conform to societal norms, political views, due to intimidation, or out of fear of legal or other consequences.
Censorship is a long term issue in Malaysia which has become more apparent as it attempts to adapt to a modern knowledge-based economy. Despite having in its Federal Constitution that subject to certain conditions, "every citizen has the right to freedom of speech and expression", Malaysia has consistently sat low on global indexes related to press and media freedom.
Censorship in Japan has taken many forms throughout the history of the country. While Article 21 of the Constitution of Japan guarantees freedom of expression and prohibits formal censorship, effective censorship of obscene content does exist and is justified by the Article 175 of the Criminal Code of Japan. Historically, the law has been interpreted in different ways—recently it has been interpreted to mean that all pornography must be at least partly censored, and a few arrests have been made based on this law.
Censorship is the suppression of speech, public communication, or other information. This may be done on the basis that such material is considered objectionable, harmful, sensitive, or "inconvenient". Censorship can be conducted by governments, private institutions, and other controlling bodies.
The Internet Watch Foundation (IWF) is a global registered charity based in Cambridge, England. It states that its remit is "to minimise the availability of online sexual abuse content, specifically child sexual abuse images and videos hosted anywhere in the world and non-photographic child sexual abuse images hosted in the UK." Content inciting racial hatred was removed from the IWF's remit after a police website was set up for the purpose in April 2011. The IWF used to also take reports of criminally obscene adult content hosted in the UK. This was removed from the IWF's remit in 2017. As part of its function, the IWF says that it will "supply partners with an accurate and current URL list to enable blocking of child sexual abuse content". It has "an excellent and responsive national Hotline reporting service" for receiving reports from the public. In addition to receiving referrals from the public, its agents also proactively search the open web and deep web to identify child sexual abuse images and videos. It can then ask service providers to take down the websites containing the images or to block them if they fall outside UK jurisdiction.
On 5 December 2008, the Internet Watch Foundation (IWF), a British watchdog group, blacklisted content on the English Wikipedia related to Scorpions' 1976 studio album Virgin Killer, due to the presence of its controversial cover artwork, depicting a young girl posing nude, with a faux shattered-glass effect obscuring her genitalia. The image was deemed to be "potentially illegal content" under English law which forbids the possession or creation of indecent photographs of children. The IWF's blacklist are used in web filtering systems such as Cleanfeed.
Censorship of Wikipedia by governments has occurred widely in countries including China, Iran, Myanmar, Pakistan, Russia, Saudi Arabia, Syria, Tunisia, Turkey, Uzbekistan, and Venezuela. Some instances are examples of widespread Internet censorship in general that includes Wikipedia content. Others are indicative of measures to prevent the viewing of specific content deemed offensive. The duration of different blocks has varied from hours to years.
Internet censorship circumvention, also referred to as going over the wall or scientific browsing in China, is the use of various methods and tools to bypass internet censorship.
The precise number of websites blocked in the United Kingdom is unknown. Blocking techniques vary from one Internet service provider (ISP) to another with some sites or specific URLs blocked by some ISPs and not others. Websites and services are blocked using a combination of data feeds from private content-control technology companies, government agencies, NGOs, court orders in conjunction with the service administrators who may or may not have the power to unblock, additionally block, appeal or recategorise blocked content.
Turkey Blocks is an independent digital research organization that monitors internet access restrictions and their relation to political incidents in Turkey. Using its network of monitoring probes, the project has uncovered and documented systematic mass-censorship of communications infrastructure, primarily social media services, during national emergencies and incidents of political significance relating to human rights, freedom of expression and public policy in the region.
A 1965 Federal Bureau of Investigation surveillance photograph
A heavily redacted page from the lawsuit American Civil Liberties Union v. Ashcroft
The censor bar as used by Google in the SOPA and PIPA online protests
Censor bars applied to a model
Censor bars applied to a patient with Stevens–Johnson syndrome
Censor bars used to anonymise a woman with familial dysautonomia
The Turkish Wikipedia logo with a censor bar covering the text, used from April 2017 to January 2020 when Turkish authorities blocked online access to Wikipedia in all languages across Turkey
A portion of the redacted affidavit used to obtain a search warrant for former U.S. President Donald Trump’s Mar-a-Lago home and resort, with the signature block blacked out.
