[PHP] Preventing automated account creation

2005-04-06 Thread coding
Hi,

I have been investigating ways of preventing automated account
creation on the e-commerce system I am currently working on. Obviously I
have seen the graphical solutions to this problem, a small image containing
several letters and numbers which must be typed in by the user to confirm
account creation. However, this (it seems to me) is a bit overkill for what
is a pretty small client, I'm not entirely sure it's a good use of time to
create this script solely for them, does anyone know of anything
pre-packaged? Furthermore is it really worth doing this, what risks do
automated account creation present to an e-commerce site?

 

Tom Williams,

Digital Data



Re: [PHP] Preventing automated account creation

2005-04-06 Thread Burhan Khalid
[EMAIL PROTECTED] wrote:
Hi,
I have been investigating ways of preventing automated account
creation on the e-commerce system I am currently working on. Obviously I
have seen the graphical solutions to this problem, a small image containing
several letters and numbers which must be typed in by the user to confirm
account creation. However, this (it seems to me) is a bit overkill for what
is a pretty small client, I'm not entirely sure it's a good use of time to
create this script solely for them, does anyone know of anything
pre-packaged? Furthermore is it really worth doing this, what risks do
automated account creation present to an e-commerce site?
Google CAPTCHA for those verify image scripts.
I hope you are kidding about this what risks do automated account 
creation present to an e-commerce site.

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Re: [PHP] Preventing automated account creation

2005-04-06 Thread Josip Dzolonga
[EMAIL PROTECTED] wrote:
Hi,
   I have been investigating ways of preventing automated account
creation on the e-commerce system I am currently working on. Obviously I
have seen the graphical solutions to this problem, a small image containing
several letters and numbers which must be typed in by the user to confirm
account creation. However, this (it seems to me) is a bit overkill for what
is a pretty small client, I'm not entirely sure it's a good use of time to
create this script solely for them, does anyone know of anything
pre-packaged? Furthermore is it really worth doing this, what risks do
automated account creation present to an e-commerce site?

Tom Williams,
Digital Data
 

Well, CAPTCHA ( http://en.wikipedia.org/wiki/Captcha) is a pretty neat 
solution ( http://www.pear.php.net/package/Text_CAPTCHA ). You can also 
generate random numbers (www.php.net/rand www.php.net/mt_rand) and 
combining it with this PEAR package 
http://www.pear.php.net/package/Numbers_Words which is also a good 
solution. The pass-string if I can call it so is best to be kept as a 
session variable, since it's stored on the server-side and the user 
can't view it. Storing its hash in a cookie can be also pretty fine, but 
storing it in a GET variable is more than stupid.

Hope this helps,
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Josip Dzolonga
http://josip.dotgeek.org
jdzolonga[at]gmail.com
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RE: [PHP] Preventing automated account creation

2005-04-06 Thread Mikey
 Well, CAPTCHA ( http://en.wikipedia.org/wiki/Captcha) is a 
 pretty neat solution ( 
 http://www.pear.php.net/package/Text_CAPTCHA ). You can also 
 generate random numbers (www.php.net/rand 
 www.php.net/mt_rand) and combining it with this PEAR package 
 http://www.pear.php.net/package/Numbers_Words which is also a 
 good solution. The pass-string if I can call it so is best to 
 be kept as a session variable, since it's stored on the 
 server-side and the user can't view it. Storing its hash in a 
 cookie can be also pretty fine, but storing it in a GET 
 variable is more than stupid.

http://phpsec.org/articles/2005/text-captcha.html is a good primer on how to
use CAPTCHA effectively

HTH,

Mikey 

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