You’re trying to book concert tickets before they sell out. You click the link and before you can make the payment, you’re ...

Google is making changes to its reCaptcha system: distorted text images are out, while numbers and more-adaptive, puzzle-based authentication checks are in. The change is necessary because text-only ...

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Security experts reveal how easy it is to get fooled by this scam and what to do if you think you've been targeted.

CAPTCHAs are those now ubiquitous challenges you encounter to prove that you’re a human and not a bot when you go to log in to many websites. As a computer scientist, I see CAPTCHAs as an effective ...

A Completely Automated Public Turing test to tell Computers and Humans Apart, or CAPTCHA, is an online challenge-response ...

The goal of the Turing test is for a human to work out whether they're communicating with another person or a machine. Computers have gotten better at imitating people but they've also improved at ...