I have all my xbox360 profile saved on a 256mb xbox mem card - I took this to a friends house to use my profile on his xbox360 as he has kinect & live. I wanted to play it and any cheevs I got saved to my profile. this has all worked well, I got my mem card home and all is ok, connected to xbox live etc and everythings fine, no glitches. I'm just wondering now after I used my profile on his xbox360 can he in any way use my profile from his xbox360 even after signing out etc when I was there, could he sign back in without my knowing? I did check his hard-drive briefly and noticed my profile wasn't saved on his hard drive but again just wondering if it has somehow saved could he use it? I just don't want someone signing in as me & using my account on xbox live!!.