Preventing bots from creating accounts on a site

[emozley]

Hi,

I'm trying to find a way creating a test that has to be passed before you can create an account on my site.

The idea is to have a picture of a playing card that the user has to identify before being able to proceed. At the moment my script thinks of a random number from 1-52 and then shows the image for that number eg:

<img src="../graphics/cards.<% = RandomNumber %>.png">

My concern is that a BOT would would only have to parse the HTML to identify the number and then work out what number related to what card. Even if I distord the picture with client side code the img file is still the same.

Is there another approach I can use?

Thanks

Ed

 

[gmmastros]

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