Hi, I often charge my iPad and iPhone (both on iOS) through the USB on my Windows machine at work (I use a Mac at home). On iOS 7, I see a setting now to choose whether I "trust" the computer. Since it is my office computer, I always select "Don't Trust". That being said, if I am using the USB port SOLELY for charging (no syncing - itunes is not even on the machine), does this pose any security risks for myself? Thanks!!!