Spring Security with OAuth

OAuth authentication has been used widely by many applications. OAuth is a protocol through which applications can share the data in a secured manner. For example, consider a simple scenario in which one photo-sharing application allows the user to upload photos and the second application integrates with all photo-storing applications such as Flickr, Dropbox, and similar sites. When a second application wants to access the first application to print the photos that are uploaded, it uses the OAuth authentication to get confirmation from the user to access the photos. Ideally, it does exchange some security tokens between the applications, that is, the private key of the consumer and the public key of the server should match for the authorization to be successful.

The first application acts likes a server and the second application acts like a consumer who wants to access certain authenticated data.

Some of the parameters that are exchanged between the client and server...