Re: Going from simple to super CAPTCHA
| From: | tedd | Date: | Tue, 12 Jun 2007 15:49:47 +0000 |
| Subject: | Re: Going from simple to super CAPTCHA | ||
| References: | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-256722@lists.php.net to get a copy of this message | ||
At 2:12 PM +0100 6/12/07, Stut wrote:
The submit image is bigger than the circle, and I'm guessing Tedd is checking the coords passed through. -StutYes, that's all the technique does for now. It just checks the submit x and submit y and determines if those coordinates lie within the circle. I fixed the empty submit x/y that Tijnema & Rob found, but that was my fault for not validating input -- but that doesn't invalidate the method. Please pardon my ignorance, but what I'm trying to understand is -- how can a bot click and determine the correct x/y coordinates to pass the test -- how do they do that? If it's just find the dot, then I could just as easily throw up other images (pig, chicken, diamond, heart) and have the use click the correct image (i.e., please click the heart). And, I could even morph the key image and provide it among others asking the user to click the image that comes close to the key image. Now, how is a bot going to figure that out? Cheers, tedd -- ------- http://sperling.com http://ancientstones.com http://earthstones.com