New surveillance tech links your phone to your license plate
摘要
美国安全公司莱昂纳多推出的SignalTrace系统，可与自动车牌识别器配合使用。该系统通过传感器捕捉手机、智能手表等设备信号，在多次行程后将重复出现的设备组合视为与特定车辆关联的电子签名。即使设备信号不含机主姓名，调查人员也能依据其与已知车辆的关联记录，结合车牌信息和时间地点，推断设备携带者身份。该技术可在警方不知晓车牌号的情况下进行模式搜索。
Imagine that you share a ride to work with the same colleague most mornings. As it passes by a license plate reader, the camera records the car, which can be linked through vehicle records to its registered owner. Beside it, another sensor detects signals broadcast by devices traveling nearby, such as your phone and your colleague’s smartwatch.
After enough trips, software may treat some of those devices as a recurring electronic signature associated with the vehicle. Weeks later, one of the same device signals appears alongside a different car connected to an investigation. The signal itself may not contain its owner’s name, but its previous association with a known vehicle gives investigators another clue they can use to work out who was carrying the device.
SignalTrace, a system marketed by the security company Leonardo, is designed to work alongside automatic license plate readers. The company says it can recognize groups of consumer devices that regularly move together, then associate them with license plate records and time-stamped locations. The pattern can then be searched even when a police investigator does not know the plate number.
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