Why use the cloud when you can put a cheeky micro SD up the bum?
No need to get that uncomfortable. I've seen hollowed out coins which looked like the real thing but which had a space inside. You opened it up by knocking it whilst positioned on a ring (which you can just wear as apparent jewellery). The coin metal also shields it from Xray.
If someone wants to carry data, there are many, many ways. The only way you could stop that is to prevent the use of any metal of mini-SD card size or larger, but at that point, someone will come up with a smaller nano-SD card and the game starts all over again.
Biting the hand that feeds IT
