A comprehensive engineering evaluation of energy constraints, lightweight cryptography, and physical security in wearable medical devices.
From smart rings detecting cardiac arrhythmias to wearable patches continuously monitoring glucose levels in diabetic patients, wearable IoMT devices generate vital clinical data. However, their small batteries and compact form factors historically led manufacturers to omit hardware security, creating grave privacy and safety vulnerabilities. WearableHSM demonstrates that enterprise-grade security can fit within sub-milliwatt power envelopes.
In battery-powered wearables, radio transmission (BLE) consumes significantly more energy than computing. By utilizing WearableHSM's on-chip hardware compression and ASCON encryption, the device reduces packet sizes and air-time, paradoxically extending overall battery life while achieving military-grade encryption.
WearableHSM is packaged using Wafer-Level Chip-Scale Packaging (WLCSP), measuring less than 1.5mm x 1.5mm x 0.4mm. It can be embedded into curved smart ring rings, flexible PCB adhesives, and waterproof smart textiles without adding measurable bulk.