Best way to develop mobile app

Question

I'm trying make my first app. I'm doing that with Visual Studio 2013 Update 3 so that I can make a native app (Cordova).

The first project that I want to develop is an app that shows data from a database. I want to protect the app.

So I think the best way to develop this project is as follow:

1. oauth2 for the security for the app
2. A WPF service that communicates between the app and the database
3. Windows-based security for WPF security
4. Office365 provider for oauth2

What is your opinion? Is there a better way?