Can apple find out that you jailbroke your iPhone if you restore?

I was planning on jailbreaking it today with the evasi0n thing coming out but I have apple care and would they void it since they know that I jailbroke? Or could I just restore and they would never know? And how can you be sure they won't know if the restore thing works!

When you jailbreak your guarentee -and I think Apple Care is included to that- is not void. But when you restore it back, it is void again. So they don't get it if you jailbreaked or not