Given the proliferation of Bluetooth wireless technology, there are a lot of questions and discussions about Bluetooth security. One of the most common questions asked at Cassia Networks involving Bluetooth security is “How secure is Bluetooth Low Energy (BLE)?”
The answer touches on specifics about BLE, and several general Bluetooth security issues. Moreover, the answer involves three aspects of BLE security. We will review the operating concepts behind each of these aspects of BLE security.
Firstly, in all BLE versions of the past several years, there are two types of BLE security. These two types are included in Bluetooth LE specifications 4.0 first introduced in 2009, 4.1 introduced in 2013, 4.2 introduced in 2014, and 5.0 specified in 2016.