Can I lock my itunes just to my own ipod? -

I have an ipod and about 500 songs in my itunes library. My brother is getting an ipod soon and I know he will try and steal all my songs that I payed for with my hard earned money. Is there anyway I can lock off my songs so only my ipods can download songs from my library?? I don t want him to be able to sync any of my songs at all.|::::|es , have the computers administrator setup an account for him and you. then when he logs on , he will log on to his own itunes account.