captcha

Captcha for Flash and ASP.NET

I'm looking for a way to use CAPTCHA in a Flash form with an ASP.NET back-end. ...

Captcha image verification: in C#.net and asp.net

I want Captcha image verification. how i can create with asp.net form? ...

PHP Ajax Captcha(Securimage) issue

Hi, i have a little problem with captcha validation using php and ajax. this is the php validation: if(trim($code) == '') { $error_captcha = '<p class="error">some empty error....</p>'; $errorc = 'error'; $error = $erdiv; } else if (trim($code) != ''){ require_once ('securimage.php'); $captcha = new Securimage(); $valid = $captcha->c...

Wordpress captcha in contact form 7?

Hi I'm using contact form 7 with Really Simple CAPTCHA, but it's throwing up the following validation errors. Is there a way to fix this? Or is there another plugin or can I just enter it into the html? Thanks for your help Regards Judi # Line 261, Column 84: document type does not allow element "input" here; missing one of "ins...

Is a captcha enough to enforce multiple failed login attempts?

Before I go crazy and try to script a way to lock folks out of their accounts on multiple failed attempts, is a captcha ideal? I've seen several sites that do this, but wasn't sure how effective it would be. Granted, if a human is indeed trying to "hack" into someone else's account, I would think blocking access for a few minnutes would ...

Any non ReCaptcha controls are available for .net

I am looking an open source captcha control for asp.net forms. We want to avoid using ReCaptcha because our solutions are deployed to corporate environments where it is more restrictive. Ideally would like to a solution which avoid server calls. Any ideas? ...

should we use a captcha for Sign Up ?

Hello, I know it's not really a programming question but I don't know where to ask it. Should i use a captcha in my sign up form ? Facebook, twitter, foursquare, gowalla etc... don't use one (or not a visible one). Is there an invisible catpcha on theses sites ? Thank you UPDATE : I have found a nice article about it : http://www.sma...

Captcha replacement

Hi, I stumbled upon http://www.kettletime.com.au/chance where the user needs to drag and drop a box with a number into another box to prove that he is human. How do you implement this? Any free library to do this? Thanks ...

Easy to implement captcha with codeigniter?

I'm using CodeIgniter and need an easy to implement captcha. Something simple, nothing too complicated. Any ideas? ...

Putting CAPTCHAs on their own page?

We need to put a captcha image on our ASP.NET MVC 2 based website. We chose reCaptcha and built it in using the way described by Derik Whittaker. The idea there is baiscally to build some abstractions and all you need to do is decorate your Controller with a [ValidateCaptcha] attribute. This works all fine. However, we have a lot of for...

How do I correctly Re-render a Recaptcha in ASP.NET MVC 2 after an AJAX POST

Ok... I've downloaded and implemented this Recaptcha implementation for MVC which uses the ModelState to confirm the validity of the captcha control. It works brilliantly... except when I start to use it in an AJAX Form. In a nutshell, when a div is re-rendered with AJAX, the ReCaptcha that it should contain does not appear, even tho...

How to retrieve captcha and save session with PHP cURL?

UPDATE: SOLVED Hi all, i've got it, just save cookie to temp file, and resubmit form with curl and set cookies with previous temp file :) thanks all for respond :) Hi all, i'm create some script to submit content via php curl. first fetch session and captcha, and user must submit captcha to final submit. the problem is i c...

Should I use the GD library in PHP to draw CAPTCHA images?

Is PHP's GD library suitable for drawing images from scratch? Or would I be better off just importing an image and altering it... ...

Is there a way to filter out offensive words from Jcaptcha?

We are using JCaptcha for a captcha tool in a small app that my team is writing. However, just during development time (on a small team - 4 of us), we've run across a number of curse words and other potentially offensive words for the actual captchas. Is there a way to filter out potentially offensive words so that they are not present...

Can you run your own reCaptcha service, in your own web app?

Is the backend used by reCaptcha open source? Is it a simple web app that can be deployed in a given container? Thanks, LES ...

Block users using auto-clickers

I'm having some problems with users cheating my online game by using macros to automatically click certain spots on the screen in a certain order to automate various tasks without having to actually be playing the game. Are there any methods that can be used to block this kind of activity without having to plaster CAPTCHAs all over the ...

recaptcha image and curl + php

$page = $curl->post($baseUrl.'/submit.php', array('url'=>$address,'phase'=>'1','randkey'=>$randKey[0],'id'=>'c_1')); $exp = explode('recaptcha_image',$page); The id recaptcha_image is not found although if i echo $page; the webpage will be displayed and surprisingly even the recpatcha div (with the image itself). Curl shouldn't load th...

Captcha loading problem in popup

I am using jquery.load() to load a page on click of a button. The page that will be loaded contains a captcha. When that page is getting loaded due to the captcha it is making the page to reload again and it is not showing anything. If i am removing the captcha from the load page it is working fine. I am using ASP.NET. Can anyone help me...

PHP Verification Codes CAPTCHA

I run a game website so I have many users logged in and they can do certain things once every two minutes. I have a CAPTCHA system in places, and for some things it will always ask for a code, and for other things, it will ask once every 10 minutes. I have had some players use the auto submit feature on Opera, and my CAPTCHA system doe...

One url to image, few results

Hi! I'm trying to show programmers that some captchas are too weak, and i'm breaking them. Now i've got something like this: Function: <?php function cbreak($image) { $info = getimagesize($image); $width = $info[0]; $height = $info[1]; $img = imagecreatefromgif($image); $map = array(); for($y=0; $y<$height; $y++) { for($x=0; $x<...