Bluetooth 4.2 increases privacy, adds speed and IPv6
▻http://www.nfcworld.com/2014/12/08/333126/bluetooth-4-2-increase-speed-security-smart-devices
Bluetooth beacons are now unable to engage with smartphones without permission from the user and making it harder for eavesdroppers to track a device via its Bluetooth connection.
[...]
the Internet Protocol Support Profile (IPSP) will allow Bluetooth Smart sensors to access the Internet directly via IPv6/6LoWPAN,”
The Verge :
▻http://www.theverge.com/2014/12/3/7330117/bluetooth-4-2-is-faster-safer-and-lets-lightbulbs-connect-to-the
Bluetooth 4.2 has clear advances over its predecessors, but Ars Technica reports that “some, but not all” of the new specification’s features will be available to those with older devices. Many Bluetooth adapters included in modern devices are configured to work with Bluetooth 4.0, and although a software update previously meant devices using such adapters could also use version 4.1, a Bluetooth SIG spokesperson said that to take advantage of the increased speed and packet size of version 4.2, a hardware update would be required.