CAPTCHA
Full article150 words · extracted from schneier.com · click to collapse
This is an actual CAPTCHA I was shown when trying to log into PayPal.

As an actual human and not a bot, I had no idea how to answer. Is this a joke? (Seems not.) Is it a Magritte-like existential question? (It’s not a bicycle. It’s a drawing of a bicycle. Actually, it’s a photograph of a drawing of a bicycle. No, it’s really a computer image of a photograph of a drawing of a bicycle.) Am I overthinking this? (Definitely.) I stared at the screen, paralyzed, for way too long.
It’s probably the best CAPTCHA I have ever encountered; a computer would have just answered.
(In the end, I treated the drawing as a real bicycle and selected the appropriate squares…and it seemed to like that.)
Tags: authentication, captchas
Sidebar photo of Bruce Schneier by Joe MacInnis.
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