![]() Until current mobile battery technology improves, we can't be expected to utilize anything that significantly depletes the life of a battery. I'd argue that it could be the most important aspect which determines the winner. Since both specifications are touted as "low energy" and expected to help fuel innovation in the always on society we live in, power consumption is important. Bluetooth 4.0 is compatible with any of the older Bluetooth specifications, and Wi-Fi Direct can connect to any older wireless protocol. ![]() That is to say, both are fully capable of connecting with devices that precede the releases of the current technology. Backwards Compatibilityīoth devices are remarkably backwards compatible. Winner: Wi-Fi Direct, although both are more than adequate in terms of security. Cracking even an AES 128-bit encryption by brute force would still take over a billion billion (yes, billion billion) years with current computational power, making it theoretically unbreakable. I wrote a more in-depth piece on encryption a while back, but for those encryption novices amongst us, don't be caught up in numbers. The winner is clear, but it should be stated that even Bluetooth 4.0 is remarkably secure. After completion, Bluetooth goes back into "standby" mode, meaning it won't use power when it's not needed. ![]() Once a device is paired, the connection remains active only while in use, a feature that wasn't available in previous generations of Bluetooth technology due to difficulty in pairing and connecting some Bluetooth-ready devices.įor example, if you want to share a photo between two phones via Bluetooth, the connection becomes active while the transfer begins. ![]() The idea behind Bluetooth 4.0 is to conserve battery life while maintaining an always-on environment by remaining dormant unless data is being shared. In essence, it's an always-on signal that beams back and forth between devices in order to quickly - and without using much power - communicate between devices. The true purpose of Bluetooth 4.0 is found when discovering just what it can accomplish using a low-energy signal to broadcast from device to device - or beacon to device - without depleting the battery of your mobile phone, tablet or wearable.
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