Your demo at www.dmxzone.com/demo/php/reCAPTCHA/index.php doesn't seem to be working. I am on a mac using Chrome and if I type the captcha code in completely wrong I see the invalid message. However, if I type just one or two characters wrong, e.g. the last two characters, it lets the form submit fine.

I've been looking for an easy to use captcha solution and I'd love to buy this, but I want to be sure it works fully,

Thanks.

It appears to be by default accepting one character error.

But that's not the DMXZone extension / code which works as it should. All the accept or fail parsing is done by Google; that's where the anomaly happens.

FYI I just tried with similar results via my DMXZone extension pasted to a php page locally and with FireFox (Win).

Regards.

Hello Simon,

This is what reCAPTCHA wiki says:

Quote

reCAPTCHA is accepting incorrect words

reCAPTCHA consists of two words: a verification word, to which the reCAPTCHA server knows the answer and a read word which comes from an old book. The read word is not graded (since the server is using human guesses to figure out the answer). As such, this word can be entered incorrectly, and the CAPTCHA will still be valid. Each read word is sent to multiple people, so incorrect solutions will not affect the output of reCAPTCHA.

On the verification word, reCAPTCHA intentionally allows an "off by one" error depending on how much we trust the user giving the solution. This increases the user experience without impacting security. reCAPTCHA engineers monitor this functionality for abuse.

So there is no need to worry about the security.