Authentication is essential for any project with an admin panel. ASP.NET Core MVC provides Cookie Authentication as a simple and effective way to protect admin pages.

During login, the application checks the username in the database and verifies the password hash. Passwords should never be stored as plain text. Algorithms such as BCrypt should be used to hash and verify passwords securely.

The Remember Me option controls whether the authentication cookie is session-based or persistent. If it is not selected, the cookie behaves like a session cookie. If selected, it can remain valid for a configured period such as 30 days.

Logout should call SignOutAsync to remove the authentication cookie. Admin controllers should be protected with the Authorize attribute so unauthenticated users cannot access restricted pages.