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Posted by Jim Michaels on 02/07/06 10:06
"frizzle" <phpfrizzle@gmail.com> wrote in message
news:1138227180.394441.177630@z14g2000cwz.googlegroups.com...
> Carl Vondrick wrote:
>> You may want to look into Mcrypt
>> (http://us3.php.net/manual/en/ref.mcrypt.php). But, with Peter said,
>> what are you really try to achieve?
>
> What i'm trying to do is build a way of security that a human is
> submitting a form.
> I know there are ways out there already, but i also have other purposes
> in mind.
>
> Example:
>
> Image random generated according to key 1:
>
> image.php?txt=kjGKUGFfas8gkjafKfasdf
>
> The image is a php file, getting $_GET['txt'], decrypt it according
> key 1, and encrypt it according to key 2. The second encrypting
> becomes visible in the actual image.
>
> I have a have a hidden form field with the value of key 1, and the
> visitor has to insert the text from the image / key 2 into a form
> field.
>
> Then after posting i compare the decrypted hidden formfield's value
> against the user submitted value ( / image's value). if they match,
> the user read the image, and is human ...
Not sure, but sounds like a CAPTCHA. They can be OCR'd
(http://www.ocr-research.org.ua/ ) from what I found in an earlier post.
>
> It might sound stupid, sloppy or whatever, but i'm just trying to
> achieve my goal.
>
> Thanks.
>
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