The new release brings with it some long-awaited new features, and marks a substantial expansion of the security and authorization capabilities available to ASP.NET applications of all types.
ASP.NET team released Identity framework 2.0. The new release contain some new features like generic primary key. This article explain how to change primary key from string to integer & use it with MVC5.
ASP.NET Identity in Visual Studio 2013 is a way to simplify the boring but essential tasks of managing user data and establishing a more effective membership system.
ASP.NET Identity is currently the main framework used to add authentication and authorization capabilities to an ASP.NET site.
Say for example you have a CMS :) You want to give full control to the developer to manage how their front-end members with authenticate, which could of course include ASP.Net Identity OAuth login providers. At the same time you want to easily allow your CMS to be configured so that ASP.Net Identity OAuth providers can be used for logging into the back office.