On my jailbroken 3G there was no hardware encryption so when I would look at it in iPhone Explorer I could see all my pdf files etc. An iPhone 4 that says it's hardware encrypted. Could someone take my un-jailbroken iPhone 4, jailbreak it and still see any pdf files like the 3G? How about with an app like GoodReader that uses the hardware encryption for the files it stores? Would any pdf file I have stored in that app be exposed?