Hello,

I have been fighting with CAPTCHA and robots for so long time and I wonder if this Captcha could be the ultimate one ?

Have you ever found robots find the reply to your question ?

If it works, sad that it was not better advertised or given with CAPTCHA pack, waste of time to try all the other kinds of Catpcha...

Thanks.

Comments

alliax’s picture

alliax commented

It's not the robots who will find the answer..
The spammers use a software which has already a big database or questions/answers and has also algorythm to find answers of common captcha questions such as math calculations or image captcha..

But those software also report to the spammer the captchas that it was unable to solve, so the spammer can give the answer to the software for future use.

That's why with a question you come up with which is not common, there are few chances that the spammer will bother giving the software the correct answer just to spam your site. Most likely the spammers ignore those missed captchas because there are so many sites out there that can be spammed already with the software alone.

But yes, if one spammer bothers to give the correct answer, then the software will know how to answer the question next time it is used for spam. It's possible also that some spam software use a shared database of questions/answers so that a correct answer can then be used by all spammers using the same software, but that shared database must not be a common feature out there.

So I'd say riddler is a good way to keep automated spam at bay as long as you come up with a quite unique question related to your site for instance.

awolfey’s picture

awolfey commented
Category: task » support
Status: Active » Closed (fixed)

You'll have to try to find questions that work. Spammers will figure it out eventually.

Closing.