As I'm not familiar with decrypting methods, I'd like to ask for help here. In the PS3 version of Battlefield 3 is a file named initfs_Ps3, which I suspect to include the icon music in AT3 format. To check this and possibly get a truly complete music rip of this game, I need a decrypter for the file. As far as my research online went it seems to be just some XOR plus a key.
Here's the file: http://7azzx5djhp.1fichier.com/
Any help is highly appreciated!

Regards, Timo