How do you sell a phone without giving away the data on it? If you've used a phone even briefly, it's filled with all kinds of sensitive data, including passwords and login tokens alongside personal texts and photos, all of which need to be erased before you can safely put the phone up for sale. The standard answer is a factory reset, which wipes the memory and restores the phone's setting, but there's a growing body of evidence that, for Android phones at least, the factory reset isn't enough.
A study published last week revealed methods that can dig up incredibly sensitive data from supposedly wiped phones, including the login token used to sign into Google accounts. The core of the problem is flash memory, which limits how often a...
Android's factory reset is a security problem. Here's how to fix it
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