Understanding the authentication and authorization process

ASP.NET Identity Core makes a vital shift in the way that authentication works with the previous versions. In earlier versions, current users of the request are of the IPrincipal type that can be retrieved through the HttpContext object, whereas with ASP.NET Core Identity, the user is of the ClaimsPrincipal type that implements IPrincipal. In previous versions, authorization was typically role-based, whereas now it's completely claims-based and known as ClaimsIdentity. The ClaimsIdentity object contains a list of claims that the user has, for example, first name, last name, e-mail address, bank account, and phone number are some of the popular claims, but there are many more. A claim is nothing but a key value pair that can be defined using the Claim object. Claims are used to represent the properties of the user that can be used further for authorization purposes.

The ASP.NET Core Identity system is integrated with the ASP.NET platform...