Fingerprint scanners are becoming increasingly common on smartphones – when they first came out, they were available only on high-end handsets like the iPhone 5S and the Samsung Galaxy S5, but now feature on devices that cost as little as $150. They’re great for adding a layer of security to your phone and make it convenient to log in to accounts and pay for purchases – but are they any good for maintaining your privacy in front of law enforcement? Not so in the US. In October 2014, a Virginia court ruled that suspects can be asked to unlock their phones…
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