Captcha
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The captcha answer type will protect your survey against unwanted automated answers from bots.
Size
set the size of the captcha from normal to invisible.
Theme
color theme used to render the captcha.
Expires after
minutes after which the authorization of the captcha is not valid anymore and requires the respondent to re-confirm.
You may configure additional captcha properties from the page.
Google's recaptcha site key
your personal .
Google's recaptcha secret key
your personal
Google recaptcha URL
of the captcha
It requires to have setup the Google captcha settings in your ngSurvey or from the .