CAPTCHA: Difference between revisions

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'''Completely Automated Public Turing test to tell Computers and Humans Apart''' or {{Wplink|CAPTCHA}} was invented in 2000 as a means to deter {{Wplink|Internet bot|bots}} and ~~{Wplink|Spamming|~~spam}} on publicly available websites.<ref name=":0">{{Cite web |last=Burling |first=Stacey |title=CAPTCHA: The story behind those squiggly computer letters |url=https://phys.org/news/2012-06-captcha-story-squiggly-letters.html |website=Phys.org |date=15 Jun 2012 |access-date= |url-status=usurped |archive-url=https://web.archive.org/web/20120617130133/https://m.phys.org/news/2012-06-captcha-story-squiggly-letters.html |archive-date=17 Jun 2012}}</ref> CAPTCHA tests aim to confirm that the visitor of a website or service is human, usually by presenting a challenge which humans can solve easily, but computer programs cannot. Primary CAPTCHAs used today are [[Google]]'s [[reCAPTCHA]] and hCaptcha.

'''Completely Automated Public Turing test to tell Computers and Humans Apart''' or {{Wplink|CAPTCHA}} was invented in 2000 as a means to deter {{Wplink|Internet bot|bots}} and spam on publicly available websites.<ref name=":0">{{Cite web |last=Burling |first=Stacey |title=CAPTCHA: The story behind those squiggly computer letters |url=https://phys.org/news/2012-06-captcha-story-squiggly-letters.html |website=Phys.org |date=15 Jun 2012 |access-date= |url-status=usurped |archive-url=https://web.archive.org/web/20120617130133/https://m.phys.org/news/2012-06-captcha-story-squiggly-letters.html |archive-date=17 Jun 2012}}</ref> CAPTCHA tests aim to confirm that the visitor of a website or service is human, usually by presenting a challenge which humans can solve easily, but computer programs cannot. Primary CAPTCHAs used today are [[Google]]'s [[reCAPTCHA]] and hCaptcha.

==Consumer impact summary==

<blockquote>"It's an arms race between site owners and spammers; users lose." - Jeremy Elson<ref name=":0" /></blockquote>

~~Overall~~, ~~CAPTCHA technology has been shown to waste human time with only marginal~~ security ~~improvement~~.<ref name=":12">{{Cite journal |last=Searles |first=Andrew |last2=Prapty |first2=Renascence Tarafder |last3=Tsudik |first3=Gene |date=21 Nov 2023 |title=Dazed & Confused: A Large-Scale Real-World User Study of reCAPTCHAv2 |url=https://arxiv.org/pdf/2311.10911 |journal=Preprint}}</ref>{{~~Citation needed~~}}

According to a study by Searles et al., "...it can be concluded that reCAPTCHAv2 presents no real security.".<ref name=":12">{{Cite journal |last=Searles |first=Andrew |last2=Prapty |first2=Renascence Tarafder |last3=Tsudik |first3=Gene |date=21 Nov 2023 |title=Dazed & Confused: A Large-Scale Real-World User Study of reCAPTCHAv2 |url=https://arxiv.org/pdf/2311.10911 |journal=Preprint}}</ref> Datadome found that half of passed CAPTCHAs were completed by bots.<ref>{{Cite web |last=Tester |first=Paige |date=18 July 2022 |title=50% of passed reCAPTCHAs are completed by bots? |url=https://datadome.co/bot-management-protection/50-passed-recaptchas-completed-by-bots/ |url-status=live |archive-url=https://web.archive.org/web/20260219130955/https://datadome.co/bot-management-protection/50-passed-recaptchas-completed-by-bots/ |archive-date=19 Feb 2026 |access-date=9 Apr 2026 |website=DataDome}}</ref> In response, the latest CAPTCHAs are using aggregated data of browsing history to rate a user's "humanness", presenting concerns around tracking and privacy.<ref>{{Cite web |date=9 April 2026 |title=How CAPTCHAs work {{!}} What does CAPTCHA mean? |url=https://www.cloudflare.com/learning/bots/how-captchas-work/ |url-status=live |archive-url=https://web.archive.org/web/20260401170306/https://www.cloudflare.com/learning/bots/how-captchas-work/ |archive-date=1 April 2026 |access-date=9 April 2026 |website=Cloudflare}}</ref>

===Accessibility===

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-'''Completely Automated Public Turing test to tell Computers and Humans Apart''' or {{Wplink|CAPTCHA}} was invented in 2000 as a means to deter {{Wplink|Internet bot|bots}} and {Wplink|Spamming|spam}} on publicly available websites.<ref name=":0">{{Cite web |last=Burling |first=Stacey |title=CAPTCHA: The story behind those squiggly computer letters |url=https://phys.org/news/2012-06-captcha-story-squiggly-letters.html |website=Phys.org |date=15 Jun 2012 |access-date= |url-status=usurped |archive-url=https://web.archive.org/web/20120617130133/https://m.phys.org/news/2012-06-captcha-story-squiggly-letters.html |archive-date=17 Jun 2012}}</ref> CAPTCHA tests aim to confirm that the visitor of a website or service is human, usually by presenting a challenge which humans can solve easily, but computer programs cannot. Primary CAPTCHAs used today are [[Google]]'s [[reCAPTCHA]] and hCaptcha.
+'''Completely Automated Public Turing test to tell Computers and Humans Apart''' or {{Wplink|CAPTCHA}} was invented in 2000 as a means to deter {{Wplink|Internet bot|bots}} and spam on publicly available websites.<ref name=":0">{{Cite web |last=Burling |first=Stacey |title=CAPTCHA: The story behind those squiggly computer letters |url=https://phys.org/news/2012-06-captcha-story-squiggly-letters.html |website=Phys.org |date=15 Jun 2012 |access-date= |url-status=usurped |archive-url=https://web.archive.org/web/20120617130133/https://m.phys.org/news/2012-06-captcha-story-squiggly-letters.html |archive-date=17 Jun 2012}}</ref> CAPTCHA tests aim to confirm that the visitor of a website or service is human, usually by presenting a challenge which humans can solve easily, but computer programs cannot. Primary CAPTCHAs used today are [[Google]]'s [[reCAPTCHA]] and hCaptcha.
 ==Consumer impact summary==
 <blockquote>"It's an arms race between site owners and spammers; users lose." - Jeremy Elson<ref name=":0" /></blockquote>
-Overall, CAPTCHA technology has been shown to waste human time with only marginal security improvement.<ref name=":12">{{Cite journal |last=Searles |first=Andrew |last2=Prapty |first2=Renascence Tarafder |last3=Tsudik |first3=Gene |date=21 Nov 2023 |title=Dazed & Confused: A Large-Scale Real-World User Study of reCAPTCHAv2 |url=https://arxiv.org/pdf/2311.10911 |journal=Preprint}}</ref>{{Citation needed}}
+According to a study by Searles et al., "...it can be concluded that reCAPTCHAv2 presents no real security.".<ref name=":12">{{Cite journal |last=Searles |first=Andrew |last2=Prapty |first2=Renascence Tarafder |last3=Tsudik |first3=Gene |date=21 Nov 2023 |title=Dazed & Confused: A Large-Scale Real-World User Study of reCAPTCHAv2 |url=https://arxiv.org/pdf/2311.10911 |journal=Preprint}}</ref> Datadome found that half of passed CAPTCHAs were completed by bots.<ref>{{Cite web |last=Tester |first=Paige |date=18 July 2022 |title=50% of passed reCAPTCHAs are completed by bots? |url=https://datadome.co/bot-management-protection/50-passed-recaptchas-completed-by-bots/ |url-status=live |archive-url=https://web.archive.org/web/20260219130955/https://datadome.co/bot-management-protection/50-passed-recaptchas-completed-by-bots/ |archive-date=19 Feb 2026 |access-date=9 Apr 2026 |website=DataDome}}</ref> In response, the latest CAPTCHAs are using aggregated data of browsing history to rate a user's "humanness", presenting concerns around tracking and privacy.<ref>{{Cite web |date=9 April 2026 |title=How CAPTCHAs work {{!}} What does CAPTCHA mean? |url=https://www.cloudflare.com/learning/bots/how-captchas-work/ |url-status=live |archive-url=https://web.archive.org/web/20260401170306/https://www.cloudflare.com/learning/bots/how-captchas-work/ |archive-date=1 April 2026 |access-date=9 April 2026 |website=Cloudflare}}</ref>
 ===Accessibility===