Captcha

BotDetect CAPTCHA Generator protects ASP.NET/Core forms from spam. The Captcha protection is available on .NET/Core for jQuery, Angular & React frontends and ASP.NET MVCCore, MVC1-5, WebForms & WebPages backends. It works in China; doesn't stalk; nor does it slurp your form-data -- think: GDPR & LGPD! BotDetect uses many different image and sound algorithms for the generation of Captcha codes. While each Captcha algorithm is easily comprehensible to human users, generating Captcha codes by random algorithm makes the Captcha challenge extremely difficult to pass automatically. BotDetect provides an audio Captcha alternative to keep ASP.NET web applications accessible to the blind and other people for whom reading the Captcha code could be a problem, enabling you to make WCAG and Section 508 compliant websites. BotDetect is a self-hosted .NET Captcha Component -- no 3rd-party servers are involved in the generation, displaying, and validation of Captcha challenges. Therefore, BotDetect neither identify nor stalk your users and visitors -- nor does it slurp logins, passwords, and other data they fill in your forms. This allows for the GDPR, LGPD, and CCPA compliant sites -- and also does miracles for the forms on any of the national security-sensitive ones. FEATURES: -------------------- * Out-of-the-box integrations with Angular, AngularJS, jQuery, and React frontend frameworks * Produces XHTML 1.1 Strict, Section 508 and WCAG AAA compliant markup * Fully compatible with ASP.NET Core 1.x and 2.x * Fully compatible with legacy .NET 2.0 and onwards, .NET Core 1.x and .NET Core 2.x * Fully compatible with ASP.NET MVC 1-5 and ASP.NET Core MVC (MVC 6) * Fully compatible with ASP.NET WebForms * Fully compatible with ASP.NET Web Pages * Fully compatible with ASP.NET Ajax and jQuery Ajax validation * Fully compatible with SharePoint Server / Foundation * Visual Studio .NET 2017, 2015, 2013, 2012, 2010, 2008, 2005 and 2003 Designer support * Medium trust environment support for shared servers * Tested in Chrome, Firefox, Safari, IE, Edge and Opera browsers * Full support for all Android & iOS devices * Localized Captcha generation, using various Unicode character sets and downloadable multi-language sound pronunciations * Custom Captcha image size, format, color scheme... * Custom Captcha code length, style, character set, timeouts, generated code filtering... * Many other randomization & customization options * 60 secure & readable Captcha image styles * 20 secure & accessible audio Captcha sound styles * It works in China * It does not identify and stalk your users and visitors * It does not slurp your form data * It allows for the GDPR, LGPD, and CCPA compliant sites * Licensable source code What nuget to use? -------------------- Please note that from the version 4.2 onward we have two BotDetect CAPTCHA nugets on the nuget.org. * Use THIS nuget for ASP.NET applications running on the legacy .NET (non-Core) Frameworks * Use THIS nuget for ASP.NET Core applications running on the .NET Core Frameworks However, there is one special case that required the separate nuget. * Use our NEW helper nuget INSTEAD OF this one for the special case of ASP.NET Core applications running on the legacy .NET (non-Core) Frameworks. The new helper nuget name is CAPTCHA.asp.net.core.on.legacy.net.frameworks and it is available at https://www.nuget.org/packages/CAPTCHA.asp.net.core.on.legacy.net.frameworks/

CaptchaMvc will implement your web MVC applications easier and more reliable protection. Features: You can easily change or extend the current implementation of the captcha. By default there are two types of captcha, plain and mathematical. Supports MVC 3, MVC 4, MVC 5. Supports for storing captcha in the session or cookie. Supports the "intelligent" captcha.

reCAPTCHA is a free CAPTCHA service that helps to digitize books, newspapers and old time radio shows.

Captcha generator for .net core migration from CaptchaGen by yangzhongke from rupeng.com Nuget Install: Install-Package CaptchaGen.NetCore Example Code: string code = ImageFactory.CreateCode(5); using (FileStream fs = File.OpenWrite("d:/1.jpg")) using (Stream picStream = ImageFactory.BuildImage(code, 50, 100, 20,10)) { picStream.CopyTo(fs); }

reCAPTCHA for .NET is a top .NET-based reCAPTCHA library which allows developers to easily integrate Google's reCAPTCHA service in ASP.NET web applications (Web Forms, MVC 5, ASP.NET Core). The following are highlights of the library are: * Renders reCAPTCHA widget and verifies reCAPTCHA response with minimal amount of code * Provides reCAPTCHA web control (ASP.NET Web Forms for .NET Framework 4.5 and above * Provides HTML helper to quickly render reCAPTCHA widget (ASP.NET MVC 5 / ASP.NET Core 3.1 and above) * Supprts reCAPTCHA version 2 * One of the most well-documented reCAPTCHA libraries in the open source community

一个跨平台的验证码生成器工具包，支持gif动态验证码生成。目前仅测试过.Net Core的支持。

Google reCAPTCHA ASP.NET Core 3

A simple, no-drama, reCAPTCHA validation library that works with ASP.NET Core, Razor Pages, MVC 5, and WebForms.

Simplay add Google's reCaptcha v3 to your .NET Core project. Go to github for step-by-step help implementation.

This package contains web helpers to easily add functionality to your site such as Captcha validation, Twitter profile and search boxes, Gravatars, Video, Bing search, site analytics or themes. This package is not compatible with ASP.NET MVC.

Angular directive that allows you to use a Google reCaptcha widget inside a form.

CaptchaMvc will implement your web MVC applications easier and more reliable protection. Features: You can easily change or extend the current implementation of the captcha. By default there are two types of captcha, plain and mathematical. Supports MVC 3, MVC 4, MVC 5. Supports for storing captcha in the session or cookie. Supports the "intelligent" captcha.

The GoogleRecaptcha is a .NET library used to integrate the Google Captcha into the web applications based upon the asp.net platform.

C# library for easy integration with the API of 2captcha captcha solving service to bypass recaptcha, hcaptcha, funcaptcha, geetest and solve any other captchas.

PoliteCaptcha is a spam prevention library for use with ASP.NET MVC that attempts polite spam prevention before rudely presenting the user with a CAPTCHA.

Project to simplify ReCaptcha use with Support PROXY, ASP.NET MVC. All Languages supported. Readme on Github.

Captcha generator class library

This inofficial client library enables working with hCaptcha.com.

Cloudflare Javascript & reCaptcha challenge (I'm Under Attack Mode or IUAM) solving / bypass .NET Standard library.

Adds additional services to CaptchaSharp.

Google reCaptcha ASP.NET MVC

Captcha in .NET Core

CaptchaMvc will implement your web MVC applications easier and more reliable protection. Features: You can easily change or extend the current implementation of the captcha. By default there are two types of captcha, plain and mathematical. Supports MVC 3, MVC 4, MVC 5. Supports for storing captcha in the session or cookie. Supports the "intelligent" captcha.

SimpleCaptcha是一个使用简单，基于.Net Standard 2.0的图形验证码模块。

MVC compliant captcha generation library

The GoogleRecaptchaMvc is a .NET library used to create the html control of Google Recaptcha for asp.net mvc.

Not yet developed.

Captcha in .NET Core

A library that allows a developer to easily integrate Google's free Recaptcha service with an ASP.NET Web Forms or ASP.NET MVC Web application. Forked from tanveery.

Adds Request.ValidateCaptcha() extension method for MVC Request object

XCaptcha is an extendable and simple to use framework for creating CAPTCHA images.

Package Description

Generate captcha with SixLabors' libraries on .NET Core (run in both Windows and Linux environments)

ReCaptcha.NET provides a .NET wrapper library for Google's reCaptcha (http://google.com/recaptcha) API.

This inofficial client library enables working with hCaptcha.com with ASP.NET Core.

This is helper build of the BotDetect CAPTCHA nuget meant to be used ONLY with ASP.NET Core code running on top of legacy 4.5.1+ .NET frameworks. For the legacy ASP.NET code on legacy .NET, or for ASP.NET Core code on .NET Core frameworks you have to use our main CAPTCHA nuget. For the description of this nuget functionality please visit our main CAPTCHA nuget page at https://www.nuget.org/packages/Captcha/

Do not used in production. Ported from https://code.google.com/archive/p/recaptcha/ into DNX, this is an experiment and shouldn't be used for production.

Library that implements the APIs of the most used captcha solving services.

The GoogleRecaptchaWebForms is a .NET library used to create the server control of Google Recaptcha for asp.net web forms.

Captcha in .NET Core

Simple API wrapper for https://anti-captcha.com/

Extends CloudflareSolverRe, contains captcha providers (2Captcha, AntiCaptcha) that helps solving cloudflare captcha challenge.

This was originally authored by Adrian Godong, but has not been updated to match the source for awhile now. This is the most up to date source as of 9/9/2013.

Captcha in .NET Core

Simple API wrapper for https://2captcha.com/

Cloudflare JavaScript & ReCaptchaV2 challenge solving library (aka. *Under Attack Mode* bypass).

DotNetCore.Kit.Captcha

ReCAPTCHA MVC lets you embed a CAPTCHA in your web pages in order to protect them against spam and other types of automated abuse. DEMO and Document => http://recaptchamvc.apphb.com/ The primary features of the library are: --> reCAPTCHA API verion 2.0 Support --> The color theme of the widget. (dark, light) --> The type of CAPTCHA to serve. (audio, image) --> MVC 4 and MVC 5 Support

Package Description

This is unofficial nuget package for MSCaptcha.