Are there open source CAPTCHA solutions available?

Posted by craigmoliver on Stack Overflow See other posts from Stack Overflow or by craigmoliver
Published on 2008-10-28T17:50:44Z Indexed on 2010/03/15 8:49 UTC
Read the original article Hit count: 461

Filed under:

captcha

|

subjective

|

form-validation

|

language-agnostic

I'm in the process of adding CAPTCHA validation to one of my websites and need to know what open source solutions exist. Please note strengths and weaknesses and what platform they work with. I'm primarily interested in ASP.NET solutions but feel free to include PHP, Java, etc.

© Stack Overflow or respective owner

Related posts about captcha

ASP.NET Controls – CommunityServer Captcha ControlAdapter, a practical case

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
The ControlAdapter is available since .NET framework version 2.0 and his main goal is to adapt and customize a control render in order to achieve a specific behavior or layout. This customization is done without changing the base control. A ControlAdapter is commonly used to custom render for specific… >>> More
zend_captcha always fails isValid()

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I've got an issue with Zend_Captcha always returning false when the page is submitted and the captcha's isValid() method is being called. It's driving my nuts because this as far as I am concerned should work. I start by declaring this at the top of the action function of the controller $captcha… >>> More
How to Use Captcha in asp.net mvc

as seen on Stack Overflow - Search for 'Stack Overflow'
can any one tell me how to use captcha in asp.net mvc? is there any need to download any control for it? Thank You. >>> More
Are there open source CAPTCHA solutions available?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm in the process of adding CAPTCHA validation to one of my websites and need to know what open source solutions exist. Please note strengths and weaknesses and what platform they work with. I'm primarily interested in ASP.NET solutions but feel free to include PHP, Java, etc. >>> More
How to install custom modules in Kohana 3 framework

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm learning framework KohanaPhp 3 and I have a problem with adding a module called kolanos-Kohana-captcha. What I've done so far is: I copied the directory kolanos-kohana-captcha into modules directory Copied kolanos-kohana-captcha/config/captcha.php to file application/config/captcha.php Edited… >>> More

Related posts about subjective

Scoring/analysis of Subjective testing for skills assessment

as seen on Programmers - Search for 'Programmers'
I am lucky in the sense that I have been given the opportunity to be a 'Technical Troubleshooter' for our offshore development team. While I am confident and capable of dealing with most issues, I have come across something that I am not. Based on initial discussions with various team members both… >>> More
Best Practise/Subjective: Implement a finite state automaton in OOP

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi guys, I am thinking about implementing a programm with finite state automaton in an OOP language like Java or C++. What would you think is the best way to implement this with a manageable amount of available states, regarding to good software design? Is it good to implement for each state an… >>> More
Subjective question...would you use the Action delegate to avoid duplication of code?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I just asked a question that helps about using generics (or polymorphism) to avoid duplication of code. I am really trying to follow the DRY principle. So I just ran into the following code... Sub OutputDataToExcel() OutputLine("Output DataBlocks", 1) OutputDataBlocks() … >>> More
"Best" language /architecture for browser-based app with ODBC and sockets? (subjective)

as seen on Stack Overflow - Search for 'Stack Overflow'
Sorry to ask a subjective question, but I would welcome some advice. I am an experienced programmer of embedded s/w, but haven't done much network programming, although I have done a fair bit of hobbyist PHP. Anyway, I have to develop what is probably a fairly general type of app, as shown in this… >>> More
The best terminal emulator for a heavy terminal user?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I spend a lot of time at the command-line during the workday and at home too since I run Ubuntu exclusively. I've been using the default gnome terminal but I've reached a point where I'd really like to get my terminal tricked out so that my common tasks are as easy as possible. Specifically, I find… >>> More