Modern smartphones usually offer some kind of security option to let you into the phone. The iPhone has the a four-digit PIN-like passcode, Android phones have a swiping pattern, Windows Phone has a numeric or text-based password. Those work OK, but they're pretty hackable, and could well be improved by new technologies. Insidious and scary technologies. Here's the rundown.
The Problem
A large percentage of users select from a few easy-to-remember numbers. A four-digit PIN like the iPhone uses has around 10,000 possibilities, but the four most commonly used PIN numbers are used about 20…
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