Editing Internet censorship in China (section)

===SSL protocols ===
In March 2020, China suddenly started blocking websites using the TLS ([[Transport Layer Security|Transport Layer Security 1.3]]) and ESNI (Encrypted Server Name Indicator) for [[Public key certificate|SSL certificates]], since ESNI makes it difficult if not impossible to identify the name of a website based on the server name displayed in its SSL certificate.<ref>{{Cite web|date=2020-08-27|title=China Now Blocking HTTPS Traffic Using TLS 1.3 and ESNI|url=https://hide.me/en/blog/china-now-blocking-https-traffic-using-tls-1-3-and-esni/|access-date=2021-07-22|website=hide.me|language=en-US|archive-date=22 July 2021|archive-url=https://web.archive.org/web/20210722164328/https://hide.me/en/blog/china-now-blocking-https-traffic-using-tls-1-3-and-esni/|url-status=live}}</ref> Since May 2015, [[Chinese Wikipedia]] has been blocked in mainland China.<ref>{{Cite news|url=https://www.forbes.com/sites/thomasbrewster/2015/05/22/wikipedia-disturbed-over-fresh-china-censorship/#377839ae112a|title=Wikipedia Disturbed Over Fresh China Censorship|last=Fox-Brewster|first=Thomas|date=22 May 2015|work=Forbes|access-date=2018-05-02|archive-url=https://web.archive.org/web/20180503043534/https://www.forbes.com/sites/thomasbrewster/2015/05/22/wikipedia-disturbed-over-fresh-china-censorship/#377839ae112a|archive-date=3 May 2018|url-status=live}}</ref><ref>{{cite web|title=Chinese Wikipedia Blocked by Great Firewall|url=http://chinadigitaltimes.net/2015/05/chinese-wikipedia-blocked-by-great-firewall/|publisher=China Digital Times (CDT)|access-date=4 May 2017|date=20 May 2015|archive-url=https://web.archive.org/web/20170504212406/http://chinadigitaltimes.net/2015/05/chinese-wikipedia-blocked-by-great-firewall/|archive-date=4 May 2017|url-status=live}}</ref> This was done after Wikipedia started to use [[HTTPS]] encryption, which made selective censorship more difficult (see also [[Wikimedia blockade in mainland China]]).<ref>{{Cite web|title=The Wikimedia Foundation Turns On HTTPS By Default Across All Sites, Including Wikipedia|url=https://techcrunch.com/2015/06/12/the-wikimedia-foundation-turns-on-https-by-default-across-all-sites-including-wikipedia/|access-date=2020-06-03|website=TechCrunch|date=12 June 2015 |language=en-US|archive-date=24 August 2020|archive-url=https://web.archive.org/web/20200824001601/https://techcrunch.com/2015/06/12/the-wikimedia-foundation-turns-on-https-by-default-across-all-sites-including-wikipedia/|url-status=live}}</ref>