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 ...

Next time you want to post a comment on a blog or use an online contact form, chances are you'll be confronted by a puzzle asking you to read some blurry and distorted text. Known as CAPTCHA, theses ...

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 ...

As someone who has worked in cybersecurity for years, it’s been fascinating to watch the evolution of CAPTCHA. Whilst you’re probably familiar with the acronym, you may not know that CAPTCHA stands ...