ASP.NET Identity vs Custom Authentication: Which Should I Use?

What are the main differences between ASP.NET Identity and custom authentication?

ASP.NET Identity is a built-in framework for managing user authentication and authorization, while custom authentication allows you to create a tailored solution that fits specific needs. ASP.NET Identity provides features like password hashing, user roles, and claims-based authentication out of the box, whereas custom authentication gives you full control over the authentication process.

When should I choose custom authentication over ASP.NET Identity?

You might choose custom authentication if your application has unique requirements that ASP.NET Identity cannot meet, such as integrating with legacy systems or implementing specific security protocols. However, if your needs are standard, ASP.NET Identity is usually the better choice due to its ease of use and built-in features.

Can I use both ASP.NET Identity and custom authentication together?

Yes, you can use both together. For example, you might use ASP.NET Identity for most users while implementing custom authentication for specific user groups or scenarios. This hybrid approach allows you to leverage the strengths of both systems.

What are the security implications of using custom authentication?

Custom authentication can introduce security risks if not implemented correctly. You need to ensure proper password storage, implement secure token generation, and protect against common vulnerabilities like SQL injection and cross-site scripting. It's crucial to follow best practices and possibly consult security experts.