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- surveyOctober 2021
Gotta CAPTCHA ’Em All: A Survey of 20 Years of the Human-or-computer Dilemma
ACM Computing Surveys (CSUR), Volume 54, Issue 9Article No.: 192, Pages 1–33https://doi.org/10.1145/3477142A recent study has found that malicious bots generated nearly a quarter of overall website traffic in 2019 [102]. These malicious bots perform activities such as price and content scraping, account creation and takeover, credit card fraud, denial of ...