Bluetooth Low Energy GATT Security Levels

Question

I am investigating the types of security available in Bluetooth Low Energy (BLE) related to GATT. More specifically, what kind of operations are done when using gatttool wit

Answer 1

Yes it's correct but you should note that their are still exists security mode,LE security mode 1 and LE security mode 2, which is combined by different security levels. And before Bluetooth 4.2, LE is not secure i.e. you can sniffer the encrypt key at the just beginning of the LE connection.