KEHKey: Kinetic Energy Harvester-based Authentication and Key Generation for Body Area Network
summary
KEHKey converts piezoelectric energy-harvester output into symmetric keys using SensorTag loggers instrumented with PPA 1001 piezoelectric cantilevers and a simple band-pass filter to remove limb-swing noise; devices worn on chest, waist, head and hands are tested with 24 participants. A compressive-sensing information-reconciliation protocol corrects quantization mismatches and yields 12.57 bps key agreement while achieving 59% energy reduction versus accelerometer methods; mimicking and video side-channel attacks reach 74% bit agreement but 0% key recovery.
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