Bluetooth 4.2 aims to shield your smartphone from prying beacons


Image: Mashable composite. Getty Creative


Bluetooth is getting a big upgrade. The organization in charge of the spec just announced Bluetooth 4.2, which brings more features: faster connections, more privacy controls and better Internet connectivity.


We take Bluetooth for granted these days - the tech is present in virtually every device that connects wirelessly. That ubiquity has occasionally been a vulnerability, however, and the term 'bluesnarfing,' the act of covertly accessing a phone or other device via an unused Bluetooth connection, is well-known in the security community.


The rise of beacons - usually used by retailers to connect with customers' phones within stores to push relevant alerts - presents a new issue: How can a user ensure they see only the alerts they want to see? Bluetooth 4.2 promises to deal with this exact issue, making it much more difficult to track a user through beacons if they haven't specifically opted in.


At the same time, the new spec improves connections with Bluetooth Smart (aka Bluetooth LE or Low Energy) devices like sensors and fitness trackers. Under Bluetooth 4.2, data transfer will be up to 2.5x faster than before, meaning the devices don't have to work as hard, and those long-lasting batteries can keep on ticking even longer.


Finally, the new spec adds support for the newer IPv6 protocol, meaning Bluetooth 4.2 devices will have an easier time connecting directly to the Internet - specifically, the Internet Protocol Support Profile (IPSP) via IPv6/6LoWPAN. That's great news for smart home-type sensors, since the spec will enable users to access and manage them directly from the Internet.


You shouldn't have to wait too long to start enjoying the benefits of Bluetooth 4.2. Bluetooth 4.1 devices should be updatable to the new spec, although it's up to manufacturers to issue it through firmware updates. The first of those should start to roll out in a month or two.


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