captcha

Validate captcha using jquery validation

How can we validate captcha using jquery validation. avoiding post back using ajax? Can anyone please help me on this. Your help would be appreciated. Thank you. ...

i want to add captcha with ajax

hi all, well i have a form in which email and captcha validation was there but now i want to do some thing like if captcha is incorrect or left empty than my form must not reload the page i.e all those field which are already been filled out must not get blank. ...

Captcha doesn't work correctly in Railo using CFIMAGE

Hello, I was playing around with CAPTCHA in Railo using CFIMAGE recently and for some reason I couldn't make it work correctly. It generates the image and it shows up in the browser, but the font looks strange and the letters are placed all over, usually one half on top and the other on the bottom of the image. Here's my code: ...

Cannot start server with "rack-recaptcha" gem

I have followed steps, described in rack-recaptcha readme. I have done all the steps, instead of "You have to require 'rack-recaptcha' in your gemfile." Server is unable to start, because of a following error: Booting Mongrel => Rails 2.3.5 application starting on http://127.0.0.1:3001 /System/Library/Frameworks/Ruby.framework/V...

How can I resize the recaptcha in Greasemonkey?

I want to re size the text from the captcha to be easier to see, with Greasemonkey. How can I do it? For example, I have this captcha: <div id="recaptcha_image" style="width: 300px; height: 57px; "> <img style="display:block;" height="57" width="300" src="http://www.google.com/recaptcha/api/image?c=03AHJ_VuuqeICMpU36GlHCSchBzERwiDzT...

reCAPTCHA accepting one word out of two

I am a bit confused about how reCAPTCHA works. I have implemented it using ROR. Sometimes even if i specify only one word out of two, it returns true while sometimes it fails. I am really confused and not able to understand the behaviour of reCAPTCHA. ...

Captcha doesn't work correctly in Railo using CFIMAGE

Hello, I was playing around with CAPTCHA in Railo using CFIMAGE recently and for some reason I couldn't make it work correctly. It generates the image and it shows up in the browser, but the font looks strange and the letters are placed all over, usually one half on top and the other on the bottom of the image. Here's my code: And t...

CAPTCHA in java

I wanna give a shot at developing a secure login system in Java . How should I implement CAPTCHA using Jav ?? Any Ideas ... ? ...

reCAPTCHA not working in IE8

Hi everyone, reCAPTCHA (Zend_Service_ReCaptcha) is not working in IE 8 on our site. Look at this web site. Does anyone know why? It is working elsewhere including FF,Opera, etc. Thanks a lot! ...

ASP.NET MVC Registration With Captcha

Hi, I would like to allow my users to register from homepage by entering name, surname, email and password information. After submitting the form, I want to redirect my users to a security check page for a capthca validation. User will be saved to the database after this captcha validation. The scenario is similar to Facebook's homepage...

reCAPTCHA (Zend_Service_ReCaptcha) throws "Unable to Connect to tcp://api-verify.recaptcha.net:80"

Hi, I am using reCAPTCHA on this page but when I submit I get following error in my apache log: This started happening after I set ssl to true (i have to use it, becouse website is SSL) [Wed Jul 28 18:47:54 2010] [error] [client X.X.31.80] PHP Fatal error: Uncaught exception 'Zend_Http_Client_Adapter_Exception' with message 'Unable to...

Need suggestions/ideas for easy-to-use but secure captchas

To start with, I am well aware of the security/usability trade-off associated with captchas and do not need any explanation on that. I know that reCAPTCHA is the state-of-the-art in captcha technology but we just do not want to use it for our site because of the difficulty faced by users to read distorted words. Our site is a study por...

[Open] Negative Captchas - help me understand spam bots better

I have to decide a technique to prevent spam bots from registering my site. In this question I am mainly asking about negative captchas. I came to know about many weaknesses of bots but want to know more. I read somewhere that majority of bots do not render/support javascript. Why is it so? How do I test that the visiting program can'...

Captcha solution which can be used with App Engine?

Is there a simple captcha solution which can be easily integrated with a form deployed using Google App Engine? I am using Python. ...

Recaptcha fixed image size

Why is recaptcha image fixed in size 300x57 ? Even when customizing the div where the image is injected, the width and height of the div are overridden and set to 300x57. Of course the image can be re-sized after it's rendered, but why there are no options to generate the image the size developers would like it to be. http://code.google...

Drupal Captcha showing on TOP and not at bottom?

I've never had this problem. When I enable "administration links", the "place captcha here" always appears at the bottom of a content type, but for some reason it is now appearing ABOVE the title field. How do I get it below again? ...

Restrict node with CAPTCHA

Hi. is there any quick solution to restrict access to one node (page) with a captcha module (or some other, similar way)? ...

GD Captcha Generator in C

I'm writing a fastcgi app for my website in C. How do I use GD to generate a CAPTCHA image? I searched for some stuff on google in vain (still search is going on), but it would be nice if someone could give me the basic idea about the procedure. For random numbers, I will use nanoseconds as seed (or use that itself). Thanks in advanc...

using openid in secure way without captcha

Hi, I'm building a web2.0 social networking app. I've got jquery and tomcat. I don't want to use tomcat sessions at all, but still want secure login. So I'm looking at openid, like used in stackoverflow. I want to build my own ui, so I assume I use the openid libraries. My question is, assuming that a persistent cookie is left in t...

How to structure CAPTCHA validation architecture for an ASP.NET MVC site?

I'm writing an ASP.NET MVC site where I want to display a CAPTCHA when content that a user submits fails my Akismet spam check. I know how to display the CAPTCHA, but I'm having trouble imagining and planning the architecture for this. Here's what I'm currently thinking: User submits content via HTTP POST The action that handles the su...