Creating an API for mobile applications - Authentication and Authorization?

The way I'm thinking about doing the login part of this in my projects is.

Twitter addressed the external application issue in oAuth by supporting a variant they call xAuth. Unfortunately there's already a plethora of other schemes with this name so it can be confusing to sort out.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.