Transfering data using Sockets on the iPhone using SSL/TLS

Question

Hi,

I've been asked to prototype an application which share information with a server via sockets using SSL/TLS.

I've been asked to make the application in both C#(MonoTouch) and ObjectiveC(Cocoa). I've been successful with the MonoTouch route, and developed a fully working client server pair, which can communicate and share data securely using a socket connection.

Please could somebody suggest where to start with ObjC route or ideally a tutorial on iPhone Sockets using SSL? NOTE: i've been asked not to use any 3rd party libraries, official Apple ones only.

I've googled this a lot, but not found anything all that useful.

Thanks in advance.

Regards, Tom