Securing ASP.NET Web API using Token Based Authentication and using it in Angular.js application

ASP.NET Web API can be accessed over Http by any client using the Http protocol. Typically, in a Line of Business (LOB) application, using Web API is a standard practice now-a-days. This framework enables data communication in JSON format (by default) and hence helps in lightweight communication. Since the Web API adoption is increasing at a rapid pace, there is a serious need for implementing security for all types of clients trying to access data from Web API services. One of the most preferred mechanism is to authenticate client over HTTP using a signed token.