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I can't seem to understand the "Onightsl secretary" CAPTCHA. We all know that the first word is extremely hard to identify, and according to the author "secretary" wasn't the control word.

This means that reCAPTCHA knows the first word. Identified by OCR? Not possible unless reCAPTCHA deliberately distorted the image. Identified by N other people? Not possible to determine such a word with confidence either.

Or am I missing something?

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Also it seems that there is exactly one distorted word and exactly one "proper" word. I would assume the distorted word is the control word. I should try a few reCAPTCHAs to see if this is a correct assumption.

EDIT: Confirmed. The "proper" word is taken directly from book scans and I can type anything to pass the CAPTCHA. It seems that the control word is very Google-style.

> unless reCAPTCHA deliberately distorted the image.

Isn't it obvious that this is the case? There is one word in every image that is distorted in the same way and another image that might appear in some other way that Google wants to know what the word is.

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