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captcha

Tem
1/26/2008 11:25:47 PM

asp.net: Does anyone know where I can find a good and easy to understand sample or
tutorial of captcha validation for asp.net? (with source code not something
like recaptcha)
the ones I found are too complicated to implement

thanks,
Tem

Re: captcha

Juan T. Llibre
1/27/2008 9:35:29 AM

Here's a few links, complete with code samples :

http://www.beansoftware.com/ASP.NET-Tutorials/Captcha-Prevent-Bots.aspx
http://www.eggheadcafe.com/articles/20040331.asp
http://codeeleven.blogspot.com/2007/11/creating-captcha-control-in-aspnet.html

Here's a couple of opinions stating that using captcha is overrated :

http://www.brains-n-brawn.com/default.aspx?vDir=aicaptcha
http://weblogs.asp.net/rhoward/archive/2006/07/19/Why-no-CAPTCHA_3F00_.aspx

Here's the link to the free source code/binaries for ReverseDOS :
http://www.angrypets.com/tools/rdos/download.aspx

Juan T. Llibre, asp.net MVP
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
======================================
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Re: captcha

Eric Moreau
1/27/2008 10:11:55 AM

Hi

There is also:
http://www.codeproject.com/KB/aspnet/CaptchaImage.aspx?print=true
http://www.codeproject.com/KB/custom-controls/CaptchaControl.aspx

--

HTH

Éric Moreau, MCSD, Visual Developer - Visual Basic MVP
Conseiller Principal / Senior Consultant
Moer inc. (http://www.emoreau.com)
Membre du réseau .NET Expertise (www.dotnet-expertise.com)

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Re: captcha

Eliyahu Goldin
1/27/2008 11:10:30 AM

"Good and easy to understand" is quite relative. Did you look at this?

http://aspnet.4guysfromrolla.com/articles/060706-1.aspx

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

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RE: captcha

Peter Bromberg [C# MVP]
1/27/2008 6:40:01 PM

Search on "ASP.NET Captcha control" and include the quotes.
An excellent Captcha that won't strain your eyes or frustrate you is simply
to ask the user to enter the sum of two displayed numbers. Even simpler, Jeff
Attwood displays a graphic with the word "Orange" which never changes, and
states that it is near 100% effective.
-- Peter
Site: http://www.eggheadcafe.com
UnBlog: http://petesbloggerama.blogspot.com
MetaFinder: http://www.blogmetafinder.com

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