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Conditional CAPTCHA
[resolved] reCAPTCHA didn't work perfectly (4 posts)

  1. sndsfnd
    Member
    Posted 4 years ago #

    hi,

    i like your idea on this plugin, and it works on my blog. what bothering me is, sometimes the recaptcha didn't work perfectly. i'm trying to put false word (change/missing the some letter) but the comment could be approved.
    i don't it is who is responsible, it recapthca or plugin maker. thank you for your attention.

    regards,
    sandi

    http://wordpress.org/extend/plugins/wp-conditional-captcha/

  2. solarissmoke
    Member
    Plugin Author

    Posted 4 years ago #

    Hi sandi,

    This behaviour is caused by reCAPTCHA.

    reCAPTCHA uses scanned images from books to generate CAPTCHAs (more info here). The way it decides if a response is correct is to check it against other previous responses to the same CAPTCHA (because the system doesn't know what the true correct answer is). To account for this, reCAPTCHA has some margin for error built into the check - so if you get one or two letters wrong but the rest right, you will probably pass.

    You can try this for yourself on the official demo page (same link as above) - get a couple of letters wrong and it will still say you are correct.

    If you want to have only one possible correct solution to CAPTCHAs, you are better off using the default text-based option.

  3. sndsfnd
    Member
    Posted 4 years ago #

    Hi solarissmoke,

    Thank you for your info. I really likes your plugin, it makes easy blog reader to leave a comment without fear of spam. Thanks!

  4. Chukwudi Emmanuel Udegbunam
    Member
    Posted 4 years ago #

    I just tried reCAPTCHA and three spammy comments came through @ once unlike when i was using default text based option thus I'm switching back to the default text-based option.

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