Airplay with Arduino

It is possible to turn an Arduino into an Airplay device ? I know it is only software because I can use my computer to so is there a library wich could help me doing this ?

looks like Airplay using AES encryption, but requires you to license the key from Apple.

not sure if the Arduino has the crunching capabilities to real time encrypt/decrepit the stream.

Also AirPlay is a Wifi application so you will need a shield.
But basically the answer is no.

thanks for reply
I found a program called shareport wich do this on a computer.The autor provided sources.This is a kind of server wich use a private key for the authentification.It could be done on an arduino but I'm not as good in programming to do that because it is very low level programmed.
So the subject is closed