The Zen of Bluetooth Security (ZOBS) is a collection of Bluetooth security principles developed by the speaker to systematize seven years of research on Bluetooth security protocols. The talk explores Bluetooth security research through the lens of these principles, distills key lessons learned, and shares them with the broader wireless-security research community. The talk also pinpoints open research challenges in Bluetooth security and opens the floor for discussion of future research directions. The audience will learn about the state of the art in Bluetooth security and how to apply the ZOBS principles to offensive and defensive wireless-security research. The keynote covers eight Bluetooth BR/EDR, commonly called Bluetooth Classic (BC), and Bluetooth Low Energy (BLE) security papers co-authored by the speaker: BlueBrothers [8], HardaBLE [7], BLERP [6], BLUFFS [1], BLUR [5], BIAS [3], KNOB on BLE [4] and KNOB on BC [2].