Meant to provide significantly reduced power consumption and costs at communication ranges similar to those provided by Bluetooth, BLE is used for a broad range of applications in sectors such as automotive, healthcare, security, home entertainment, and more.

BLE proximity authentication is typically to unlock or keep unlocked products such as cars, smart locks, access control systems, and laptops, as long as a trusted BLE device is in range.

Because BLE proximity authentication is prone to relay attacks, various mitigations were introduced, including detectable levels of latency (strict GATT response time limits), encrypted link layer, and localization techniques.