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We present a demo of UltrasonicSpheres, a novel system for location-specific audio delivery using wearable earphones that decode ultrasonic signals into audible sound. Unlike conventional beamforming setups, UltrasonicSpheres relies on…

Sound · Computer Science 2025-07-08 Michael Küttner , Valeria Zitz , Kathrin Gerling , Michael Beigl , Tobias Röddiger

Ultra-wideband (UWB) is a state-of-the-art technology designed for applications requiring centimeter-level localization. Its widespread adoption by smartphone manufacturer naturally raises security and privacy concerns. Successfully…

Machine Learning · Computer Science 2025-01-09 Thibaud Ardoin , Niklas Pauli , Benedikt Groß , Mahsa Kholghi , Khan Reaz , Gerhard Wunder

Lately, Wireless Sensor Networks (WSNs) have become an emerging technology and can be utilized in some crucial circumstances like battlegrounds, commercial applications, habitat observing, buildings, smart homes, traffic surveillance and…

Networking and Internet Architecture · Computer Science 2017-02-24 Furrakh Shahzad , Maruf Pasha , Arslan Ahmad

As the frequency range of electromagnetic wave communication continues to expand and the integration of integrated circuits increases, electromagnetic waves emitted by on-chip antennas are prone to scattering from electronic components,…

Optics · Physics 2025-05-15 Hanchuan Chen , Fei Sun , Yichao Liu , Shuai Zhang , Hongming Fei , Zhihui Chen

An automated, standoff acoustic leak detection scheme has been designed, built, and tested. It merges the principles of glass breakage and smoke detection to alert for the presence of leaks emanating from pressurized plumbing. A simulated…

Cryptography and Security · Computer Science 2025-11-04 Michael P. Hasselbeck

Wireless Sensor Network (WSN) is consisting of independent and distributed sensors to monitor physical or environmental conditions, such as temperature, sound, pressure, etc. The most crucial and fundamental challenge facing WSN is…

Cryptography and Security · Computer Science 2016-09-20 Yassine Maleh , Abdellah Ezzati

Smart Home Personal Assistants (SPA) are an emerging innovation that is changing the way in which home users interact with the technology. However, there are a number of elements that expose these systems to various risks: i) the open…

Cryptography and Security · Computer Science 2020-12-15 Jide S. Edu , Jose M. Such , Guillermo Suarez-Tangil

Deep learning-based sound event localization and classification is an emerging research area within wireless acoustic sensor networks. However, current methods for sound event localization and classification typically rely on a single…

This paper describes the adaptation of an open-source ecological momentary assessment smart-watch platform with three sets of micro-survey wellness-related questions focused on i) infectious disease (COVID-19) risk perception, ii) privacy…

Beam alignment (BA) is a crucial process in millimeter-wave (mmWave) communications, enabling precise directional transmission and efficient link establishment. However, due to characteristics like omnidirectional exposure and the broadcast…

Cryptography and Security · Computer Science 2025-07-15 Yulin Teng , Keshuang Han , Pinchang Zhang , Xiaohong Jiang , Yulong Shen , Fu Xiao

The widespread use of smartphones gives rise to new security and privacy concerns. Smartphone thefts account for the largest percentage of thefts in recent crime statistics. Using a victim's smartphone, the attacker can launch impersonation…

Cryptography and Security · Computer Science 2017-03-10 Wei-Han Lee , Ruby Lee

The deployment of unmanned aerial vehicle (UAV) for surveillance and monitoring gives rise to the confidential information leakage challenge in both civilian and military environments. The security and covert communication problems for a…

Information Theory · Computer Science 2019-10-22 Hui-Ming Wang , Yan Zhang , Xu Zhang , Zhetao Li

Mobile autonomous systems, robots, and cyber-physical systems rely on accurate positioning information. To conduct distance-measurement, two devices exchange signals and, knowing these signals propagate at the speed of light, the time of…

Cryptography and Security · Computer Science 2019-11-26 Mridula Singh , Patrick Leu , AbdelRahman Abdou , Srdjan Capkun

Wireless communication environments comprise passive objects that cause performance degradation and eavesdropping concerns due to anomalous scattering. This paper proposes a new paradigm, where scattering becomes software-defined and,…

Networking and Internet Architecture · Computer Science 2018-12-19 Christos Liaskos , Shuai Nie , Ageliki Tsioliaridou , Andreas Pitsillides , Sotiris Ioannidis , Ian Akyildiz

Contact tracing promises to help fight the spread of Covid-19 via an early detection of possible contagion events. To this end, most existing solutions share the following architecture: smartphones continuously broadcast random beacons that…

Networking and Internet Architecture · Computer Science 2021-06-15 Pietro Tedeschi , Spiridon Bakiras , Roberto Di Pietro

In pervasive systems, mobile devices and other sensors access Gateways, which are Servers that communicate with the devices, provide low latency services, connect them with each other, and connect them to the Internet and backbone networks.…

Networking and Internet Architecture · Computer Science 2025-01-20 Erol Gelenbe , Mohammed Nasereddin

Robust, low-cost solutions are needed to maintain social distancing guidelines during the COVID-19 pandemic. We establish a method to measure the distance between multiple phones across a large number of closely spaced smartphones with a…

Signal Processing · Electrical Eng. & Systems 2020-09-01 Devansh R. Agrawal , Peter Lyon , Martin Frobisher , Andy Doherty , Ben Allen , Freddie Rawlins

Semantic communication has emerged as a promising paradigm for enhancing communication efficiency in sixth-generation (6G) networks. However, the broadcast nature of wireless channels makes SemCom systems vulnerable to eavesdropping, which…

Information Theory · Computer Science 2025-04-01 Shunpu Tang , Yuhao Chen , Qianqian Yang , Ruichen Zhang , Dusit Niyato , Zhiguo Shi

The proliferation of Internet of Things (IoT) devices has raised significant concerns regarding their security vulnerabilities. This paper explores the security risks associated with smart light systems, focusing on covert communication…

Cryptography and Security · Computer Science 2024-08-28 Ravisha Rohilla , Janvi Panwar

With the growing use of underwater acoustic communications (UWAC) for both industrial and military operations, there is a need to ensure communication security. A particular challenge is represented by underwater acoustic networks (UWANs),…

Signal Processing · Electrical Eng. & Systems 2019-01-03 Roee Diamant , Paolo Casari , Stefano Tomasin