We have several smartphone with encrypted data on them (BES, iPhone, Android) and want to prevent an unauthorized person from downloading information from the device via USB.
The visual assumption is that the USB file transfer mode is protected by a password; but then again, it is subject to implementation flaws and risks.
Are there any "known bad" or "known safe" smartphones with regard to USB security?
How does a corporation protect from these risks?
Does anyone have easy-to-understand explanations of the risks and what not to do? (e.g. use a public cellphone charging station)