.NET Recaptcha https

Answer 1

If you check out http://recaptcha.net/apidocs/captcha/client.html it says:

"In order to avoid getting browser warnings, if you use reCAPTCHA on an SSL site, you should replace http://api.recaptcha.net with https://api-secure.recaptcha.net."

So clearly recaptcha supports HTTPS submissions. Does the ASP.NET control have any properties you can configure the outbound URL? At worst you might need to use Reflector to examine the code and see how it's built.

Answer 2

The .NET library does not require any configuration to work on HTTPS environment. It will derive from the current HttpContext whether the request is made from HTTPS protocol.

But, there is RecaptchaControl.OverrideSecureMode property that you can use just in case it doesn't work as expected. Set to True to force HTTPS mode.

Update:

I seem to have misunderstood the question. I am afraid there is no HTTPS endpoint for reCAPTCHA verification (between your server and theirs).