'If you’re not familiar with how pairing works on your iPhone or iPad, this is the mechanism by which your desktop establishes a trusted relationship with your device so that iTunes, Xcode, or other tools can talk to it. Once a desktop machine has been paired, it can access a host of personal information on the device, including your address book, notes, photos, music collection, sms database, typing cache, and can even initiate a full backup of the phone. Once a device is paired, all of this and more can be accessed wirelessly at any time, regardless of whether you have WiFi sync turned on. A pairing lasts for the life of the file system: that is, once your iPhone or iPad is paired with another machine, that pairing relationship lasts until you restore the phone to a factory state.
This mechanism, intended to make using your iOS device painless and enjoyable, can actually create a rather painful state: the kiosk you just recharged your iPhone with can, theoretically, maintain a Wi-Fi umbilical cord to your iOS device for continued access even after you’ve unplugged your phone and slumped into a nearby airport lounge chair to play a round (or forty) of Angry Birds.'
'Although juice jacking isn’t as widespread a threat as outright phone theft or exposure to malicious viruses via compromised downloads, you should still take common sense precautions to avoid exposure to systems that may malicious access your personal devices.
The most obvious precautions center around simply making it unnecessary to charge your phone using a third-party system:
Keep Your Devices Topped Off: The most obvious precaution is to keep your mobile device charged. Make it a habit to charge your phone at your home and office when you’re not actively using it or sitting at your desk doing work. The fewer times you find yourself staring at a red 3% battery bar when you’re traveling or away from home, the better.
Carry a Personal Charger: Chargers have become so small and lightweight that they scarcely weigh more than the actual USB cable they attach to. Throw a charger in your bag so you can charge your own phone and maintain control over the data port.
Carry a Backup Battery: Whether you opt to carry a full spare battery (for devices that allow you to physically swap the battery) or an external reserve battery, you can go longer without needing to tether your phone to a kiosk or wall outlet...'