captcha

How to validate the captcha taking the user to another page ?

IF we want to display the captcha in a different centralized page and after getting response from that site we can validate the page. ...

Displaying facebook captcha in a picturebox

What would be a good way to do it? I don't need code, just ideas. Thanks. ...

Stop spam without captcha

I want to stop spammers from using my site. But I find CAPTCHA very annoying. I am not just talking about the "type the text" type, but anything that requires the user to waste his time to prove himself human. What can I do here? ...

Is Captcha needed even if users are forced to login to post?

I've been working on this site - I used the phpdug script to help me get a quick start. I assumed that if I forced users to login in order to post links in this digg-like website, there would be no need for a captcha. This has not worked as you can see all of the car spam. Is a captcha necessary even if I force users to login? Also, ...

A captcha and forced registration still isn't stopping robot spam

I'm using the phpdug template at http://fantasybookmark.com and there's still spam coming through. What additional steps should I take? Is recaptcha THAT much better than the captcha system in place here? ...

implementing captcha in ipad

Hi everyone, I am new to iPhone development. how is captcha in iphone implemented. Please tell me if anyone can shed some light on this. Any help is appreciated. Thanks in advance ...

PHP session problem-- captcha/Joomla

Hi - I have a Joomla component which calls a helper function to create a captcha image. Everything works fine when sh404 is disabled, but when sh404 is enabled the session variable for the security image isn't being set correctly so when you submit the form you get 'Invalid Captcha' message. The funny thing is if you submit another 5-6 t...

submit captcha and get text inside table using ASP.NET

Hello, I need to submit (send) a captcha entered manually to a site and then get text result inside an html table, how I do that using ASP.NET thanks ...

Captcha in JSF 2.0

In my project I have to integrate Captcha to my Signup Form, I have seen JCaptcha and google recaptcha can anybody suggest me the best and easy way to integrate captcha. Actually I don't want third party captcha like recaptcha so how can i generate my own one. I am using JSF 2.0 and Richfaces. ...

CAPTCHA and it's legality?

I am sourcing some info from the OWASP (open application security community) web site (http://owasp.org) and came across some info in their Authentication section. CAPTCHA (Completely automated Turing Tests To Tell Humans and Computers Apart) are illegal in any jurisdiction that prohibits discrimination against disabled citiz...

cake php captcha problem

Hello, I am facing problem with captcha in cake php. when try to call captcha the session value display previous one. so never get the right answer. Here is my code. For component section i put this code class CaptchaComponent extends Object { var $controller; var $font = 'monofont.ttf'; function CaptchaComponent( $controlle...

Captcha using jQuery

Can I got some good example sites with source code of jQuery with ASP.NET webforms using ajax.Most examples I have come across are in php ...

JQUERY/JS: Simple OCR for a simple math operations

Hi to all Dear Coders, i have opened this new question because i would like to make a simple script in Jquery or Javascript that read from very simple images the figures. This is an example of image: And this is an easy tutorial how to make: TUT Math Image And then i have see this script that read all phrases: Megaupload auto-fill ...

Are captchas need for my online form

I have an online form in asp.net which using the jQuery wizard, and was not sure my last stage would need a captcha control to prevent bots/crawlers. So would I need a captcha? for my online web form...?? Is it recommended?? ...

captcha support Mvc application with refresh image facility

hello all plz suggest me any captcha which supports in MVC application and allow captcha image to refresh with "Genreate new image" link ...

Simple_captcha image not getting displayed

Hi All, Captcha image is not displayed on the ui, instead it just shows simple_captcha.jpg. When i try to access the image through url i get following error:- "Postscript delegate failed /tmp/magick-XXKDifRg': @ error/ps.c/ReadPSImage/779:(null)'" Thanks, Anubhaw ...

Stop FIREFOX from caching captcha

So I have this form here: http://www.piataterenuri.info/register.php The problem is that Firefox caches the captcha image and after an incorect input, or a page refresh the captcha will show the old image instead of the curent one. I've already placed: header("Cache-Control: no-cache"); header("Expires: Sat, 26 Jul 1997 05:00:00 GMT")...

Captcha With Google AppEngine

I have a website where i want to put a custom made captcha, can't use online captcha services due to layout needs. It runs on google appengine. Does appengine API has a something for writing characters on a given image? I went through appengine Python Image API but it doesnot seems to be of much help. Any suggestions how to generate ca...

Recaptcha returning "The reCAPTCHA server is unavailable"

Hi, I'm using ASP.NET and plugging in the google Recaptcha user control successfully, when calling the IsValid method on it, it returns in its recaptcha.ErrorMessage property: "The reCAPTCHA server is unavailable" and recaptcha.IsValid obviously returns false. Does anyone know the reason why this could happen? Is it because I'm working...

A trouble with web browser in C#

I want to get captcha from yahoo.com to show my form. I create a button with event click. System.Net.WebClient wc = new System.Net.WebClient(); HtmlElementCollection imgs = this.webBrowser1.Document.GetElementsByTagName("img"); for (int i = 0; i < imgs.Count; i++) { if(imgs[i].Id.Trim() == "cimg") wc.DownloadFile(imgs[i].Ge...