Image authentication (like in yahoo)

Discussions of secure PHP coding. Security in software is important, so don't be afraid to ask. And when answering: be anal. Nitpick. No security vulnerability is too small.

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trigunmasteree
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Joined: Sat Aug 19, 2006 3:13 am

Image authentication (like in yahoo)

Post by trigunmasteree »

I was curious on how to make 'image authentication' (like one you see when you sign in a yahoo mail).
I was wondering how could the server (or maybe the code) generates an image of distorted random string like that.

Is there anyone who knows how to build this? Or at least a link I can donwload from?

Thx b4.
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volka
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Location: Berlin, ger

Post by volka »

search the forum/wikipedia/web for captcha
han866
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Post by han866 »

Here is a great site with Captcha code howto for PHP.

http://www.ejeliot.com/pages/2

HTH
hanji
wei
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Joined: Wed Jul 12, 2006 12:18 am

Post by wei »

here is an alogrithm to break captcha using computer

http://www.cs.sfu.ca/~mori/research/gimpy/

http://www.cs.sfu.ca/~mori/research/gim ... level.html

this research is about 4 years old.
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