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ASP Captcha Image

Dynamic Captcha Image

Dynamic Captcha Image

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$22.00

CAPTCHA is an acronym for ”Completely Automated Public Turing Test to Tell Computers and Humans Apart”. As the name suggests, it is a test that determines the probability of the solver being a human. As defined on the CAPTCHA home page at the Carnegie Melon University School of Computer Science's Web site:
CAPTCHA is a program that can generate and grade tests that:
- Most humans can pass.
- Current computer programs can't pass.

Usually Captcha is placed on a web form and it is represented by an image randomly generated. The image rapresnt a dynamic text that the user must copy in a text field. If the verification text is entered incorrectly the application will not allow the user to perform the action.
To make more difficult for text recognize application the text is slightly scrambled, rotated and/or appear over patterned background.
As a result Captcha protects web sites against unfriendly actions like mass web form spam or brute force password attacks.

This extension has 2 different method to create the image Asp and Asp.Net versione.
The 2 version work only in Asp pages but the first create the image with asp code and the Asp.Net versione create the image with Asp.Net code. You can use the first version when you work on a server without the .NET Framework installed.
The Asp.Net version has more features and create a more professional image but need the .NET Framework installed on the server.

The extension don't verify the code because the code must be verified server side, the extension insert only the random image and store in a session variable the random text
You must validate the form with your usually method or use our ServerSideValidation: http://www.dwzone-it.com/Extension/ServerSideValidate/default.asp

Documentation:
http://www.dwzone-it.com/Extension/DynamicCaptcha/default.asp

Hep and tutorials:
http://www.dwzone-it.com/Extension/DynamicCaptcha/help.asp

Live demo:
http://www.dwzone-it.com/Extension/DynamicCaptcha/demo.asp

Ui-Access
Server Behaviors >> DwZone >> Dynamic Captcha >> Dynamic Captcha Image (Asp)
Server Behaviors >> DwZone >> Dynamic Captcha >> Dynamic Captcha Image (Asp.Net)

Support:
http://forum.dwzone-it.com

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Server Behaviors >> DwZone >> Dynamic Captcha >> Dynamic Captcha Image (Asp)
Server Behaviors >> DwZone >> Dynamic Captcha >> Dynamic Captcha Image (Asp.Net)

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