---
title: "What are the types of Authentication?"  
description: "What are the types of Authentication?"  
author: "Sumit Kesarwani"  
published: 2013-12-17  
updated: 2020-09-04  
canonical: https://www.mindstick.com/interview/1831/what-are-the-types-of-authentication  
category: "c#"  
tags: ["c#"]  
reading_time: 2 minutes  

---

# What are the types of Authentication?

**There are 3 types of Authentication.**

Windows, Forms and Passport Authentication.

**Windows authentication** uses the security features integrated into the Windows NT and Windows XP operating systems to authenticate and authorize Web application users.

**Forms authentication** allows you to create your own list/database of users and validate the identity of those users when they visit your Web site.

**Passport authentication** uses the Microsoft centralized authentication provider to identify users. Passport provides a way to for users to use a single identity across multiple Web applications. To use Passport authentication in your Web application, you must install the Passport SDK.

## Answers

### Answer by Sumit Kesarwani

**There are 3 types of Authentication.**

Windows, Forms and Passport Authentication.

**Windows authentication** uses the security features integrated into the Windows NT and Windows XP operating systems to authenticate and authorize Web application users.

**Forms authentication** allows you to create your own list/database of users and validate the identity of those users when they visit your Web site.

**Passport authentication** uses the Microsoft centralized authentication provider to identify users. Passport provides a way to for users to use a single identity across multiple Web applications. To use Passport authentication in your Web application, you must install the Passport SDK.


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