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Surveillance Via Smart Toothbrush

ID: 3a483da6-05eb-5928-88cc-5c5193b9788c

STIX ID: report--3a483da6-05eb-5928-88cc-5c5193b9788c

Feed Name: Schneier on Security

Date Published: 2025-05-29

Date Updated: 2026-04-19

Author: Bruce Schneier

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The post discusses the surveillance and operational implications of UK smart water/electric meters, noting their evolving communication methods (e.g., 2G GSM, ISM, Wi‑Fi, Bluetooth) and the potential for high-frequency sampling to infer detailed activity patterns, especially under targeted “stakeout” configurations. It evaluates whether UPS and energy storage systems can mask load signatures, highlighting that only certain architectures (e.g., always-on sinewave, AC‑DC‑AC with DC storage, LISN-based phase correction, and CHP-assisted setups with thermal storage) effectively low-pass filter demand, while grid-tied solar can amplify signals. Practical considerations include radio spectrum contention reducing real-time data, economic drivers (gas vs. electricity costs), and the use of phase-change materials, sand, or water as heat batteries, concluding that careful system design can significantly smooth emitted load profiles.

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