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DP-BREM: Differentially-Private and Byzantine-Robust Federated Learning...USENIX Security '252025-08-13
Cross-silo federated learning uses client momentum that averages each client’s updates over rounds so tiny malicious perturbations accumulate and become…
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BlinKey: A Two-Factor User Authentication Method for Virtual Reality DevicesUbiComp 20212021-09-21
A two-factor VR unlock that combines blink rhythm + pupil-size adaptation as a single “blinkey,” captured by an eye tracker and classified with k‑NN…
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Acoussist: An Acoustic Assisting Tool for People with Visual Impairments to Cross Uncontrolled ...UbiComp 20212021-09-21
System uses vehicle-mounted portable speakers that emit 17–19 kHz ultrasonic chirps (inaudible to humans) and a smartphone app to detect oncoming cars by…
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Fall Detection via Inaudible Acoustic SensingUbiComp 20212021-09-21
System emits a 20 kHz continuous wave from a home audio speaker and records Doppler returns on a microphone, denoises via spectral subtraction and STFT, then…
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HELP: Helper-Enabled In-Band Device Pairing…26th USENIX Security Symposium (USENIX Security '17)2017-08-16
Proposes HELP primitive that lets a trusted helper inject random on‑slots so a hub detects signal cancellation and message injection, complements…
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