take a look at the webwizguide.com forum (available for download) which uses a similr technique that you are after. not as hi-tech, but it is useful. htt, Moshe
-----Original Message----- From: Thierry Lavall�e [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 16, 2005 3:09 AM To: [email protected] Subject: Re: [ASP] Image verification code Thanks for your reply Shawn, Nice article, but it seems this kind of anti-robot form validation is still the norm. And I would like to implement it. I would like to know if there is free or cheap open source codes around so I can implement this the proper way. I would imagine that the image name would change all the time, and/or be in relation to some session ID, so that robots cannot match it with the related validation string. Any link to such technique is very welcome at this time. Thanks! :) -- Thierry ---> Shawn K. Hall, 2/13/05 22:23 : > The image itself is rather simple to generate in PHP or ASP.net, > validation of the form, however, can be a little trickier. You'll > need to have the code you pushed to the image also be validated > *before* and *after* form submission, to ensure that Joe's Robot > doesn't simply determine /one/ of the keys used to accurately pass > the form and then store that and change fields to those values for > future use. > > More information about this here: > http://everything2.com/index.pl?node_id=1399706 --------------------------------------------------------------------- Home : http://groups.yahoo.com/group/active-server-pages --------------------------------------------------------------------- Post : [email protected] Subscribe : [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] --------------------------------------------------------------------- Yahoo! Groups Sponsor ADVERTISEMENT <http://us.ard.yahoo.com/SIG=1297voq35/M=297844.5692940.6932969.3356155/D=gr oups/S=1705115381:HM/EXP=1108602568/A=2533537/R=0/SIG=10v7of2am/*http://www. target.com/careers> click here <http://us.adserver.yahoo.com/l?M=297844.5692940.6932969.3356155/D=groups/S= :HM/A=2533537/rand=822451363> _____ Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/active-server-pages/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> . [Non-text portions of this message have been removed] --------------------------------------------------------------------- Home : http://groups.yahoo.com/group/active-server-pages --------------------------------------------------------------------- Post : [email protected] Subscribe : [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] --------------------------------------------------------------------- Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/active-server-pages/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
