Understanding BLE Through Simple Threat Modelling Most people do not realise how much their devices broadcast. Constantly. Passively. Often in plaintext. BLE may be low power, but from an attacker’s perspective it is highly informative. Last week we explored why Bluetooth remains an overlooked attack surface. This week we go deeper by applying simple threat modelling to show what an attacker actually sees and where the real exposures sit. The Everyday BLE Ecosystem This is the environment most people carry with them every day. A silent network of identifiers, telemetry and behavioural signals leaking into the air around you. Image 1: BLE Device Ecosystem. Smartwatch (Peripheral) Continuously advertises identifiers, sensor values, motion events and sync activity. This alone is enough to build behavioural profiles. Bluetooth Earbuds (Peripheral) Many models broadcast even while inside the charging case. They reveal identifiers, battery levels and reconnection attempts.…