This method of cyberattack even has a name – ‘juice jacking’, because it accesses the device via the charging jack.
A Reddit user ended up worried about this after charging their phone in a hotel, and shared a setting on the device to help get around it.
They wrote: “The next day, I was super paranoid and decided to check my security settings.
“I had the default setting, which allows USB accessory connection when phone is unlocked.
“When I changed it to ‘always ask’ and plugged the phone back for a test, I got a message asking me if I want to connect to this USB accessory.
“So, basically I unknowingly allowed my phone to connect to this device overnight the day before.”
To take advantage of this safe setting yourself, open up the Settings app and scroll down to Privacy & Security, then to ‘Wired Accessories’. Check whether your phone is on the default setting, which says ‘Automatically Allow When Unlocked’, and change it to ‘Ask For New Accessories’.
‘Juice jacking’ is theoretically possible and has been demonstrated in controlled settings, but at present no examples of it have been confirmed.
Nonetheless, if you are the cautious type then there are some measures other than this iPhone setting which you can take for your peace of mind.
One is use a cable which is for charging only, meaning that the cable itself can only transfer power and not data.
You can also make sure that you’re plugging only into a mains power outlet and not into a USB outlet.
Alternatively, you can use a power bank when out and about to make sure that you’re not caught short with your phone battery, and don’t have to rely on a public charger.
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