H0w to Secured Bluetooth Device Solution Answer Bluetooth is best known as the wireless technology that powers hands-free earpieces. Depending on your point of view, people who wear them either: a) Look ridiculous (especially if shining a bright blue LED from their ear); b) Appear mad (when apparently talking to themselves); or c) Are sensible, law-abiding, safety-conscious drivers. Bluetooth is intended to be a standard that works at two levels Risks with Bluetooth devices: Security Architecture: Using initialisation key, the devices then agree on a link key which they will use to establish a secure connection between each other when needed. There are 2 types of link key..