There are two types of encryption: one that will prevent your sister from reading your diary, and one that will prevent your government.
Security is a complex subject that for many people is just a black box. If the technology is secure, that is enough for lots of people. However, there are many things about security that need to be understood in the context of Bluetooth low energy. These include the following topics:
Authentication is defined as a way to prove that the device with which you are connecting is actually the device it claims to be and not a third-party attacker. This is done ...