What Is CAPTCHA (Besides An Online Annoyance)?

What Is CAPTCHA (Besides An Online Annoyance)?

CAPTCHAs were invented to stop spamming robots from infiltrating forums, ticket-buying websites, and other areas of the web. The most familiar CAPTCHAs use distorted text that a user must type into a box, but newer tests can incorporate images and even games.


from Are You a Human

Key Facts In This Video

  • 1

    In 1864, people were upset about an unsolicited telegram advertising a dental practice, one of the very first pieces of spam. (0:04)

  • 2

    In 1998, Yahoo was besieged by millions of spambots setting up email accounts. (0:33)

  • 3

    Computers have become better at reading CAPTCHAs, prompting CAPTCHAs to become more difficult. (1:05)

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