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Inaudible voice command injection is one of the most threatening attacks towards voice assistants. Existing attacks aim at injecting the attack signals over the air, but they require the access to the authorized user's voice for activating…

Cryptography and Security · Computer Science 2022-02-11 Yuanda Wang , Hanqing Guo , Qiben Yan

Since the 1990s, the telephone has been the primary mode of communication. However, Voice over Internet Protocol (VoIP), which is a highly straightforward and affordable form of data transfer, is now becoming an important part of daily…

Cryptography and Security · Computer Science 2025-07-30 M. Matsive Ali

In recent years, satellite communication (SatCom) systems have been widely used for navigation, broadcasting application, disaster recovery, weather sensing, and even spying on the Earth. As the number of satellites is highly increasing and…

Signal Processing · Electrical Eng. & Systems 2022-04-05 Olfa Ben Yahia , Eylem Erdogan , Gunes Karabulut Kurt , Ibrahim Altunbas , Halim Yanikomeroglu

We present MetaGuardian, a voice assistant (VA) protection system based on acoustic metamaterials. MetaGuardian can be directly integrated into the enclosures of various smart devices, effectively defending against inaudible, adversarial…

Sound · Computer Science 2025-08-14 Zhiyuan Ning , Zheng Wang , Zhanyong Tang

Over the last few years, a rapidly increasing number of Internet-of-Things (IoT) systems that adopt voice as the primary user input have emerged. These systems have been shown to be vulnerable to various types of voice spoofing attacks.…

Cryptography and Security · Computer Science 2018-11-20 Yuan Gong , Christian Poellabauer

Personal data has become one of the most valuable assets and lucrative targets for attackers in the modern digital world. This includes personal identification information (PII), medical records, legal information, biometric data, and…

Cryptography and Security · Computer Science 2024-09-09 Mordechai Guri

Underwater data infrastructures offer natural cooling and enhanced physical security compared to terrestrial facilities, but their storage systems remain susceptible to acoustic injection attacks, where sound-induced mechanical vibrations…

Signal Processing · Electrical Eng. & Systems 2026-05-26 Adnan Abdullah , David Blow , Sara Rampazzi , Md Jahidul Islam

The advancements in generative AI have enabled the improvement of audio synthesis models, including text-to-speech and voice conversion. This raises concerns about its potential misuse in social manipulation and political interference, as…

Cryptography and Security · Computer Science 2024-09-12 Hong-Hanh Nguyen-Le , Van-Tuan Tran , Dinh-Thuc Nguyen , Nhien-An Le-Khac

In the rapidly growing field of wearable technology, optical devices are emerging as a significant innovation, offering non-invasive methods for analyzing skin and underlying tissue properties. Despite their promise, progress has been…

Human-Computer Interaction · Computer Science 2024-07-18 Nazim A. Belabbaci , Mohammad Arif Ul Alam

As a versatile AI application, voice assistants (VAs) have become increasingly popular, but are vulnerable to security threats. Attackers have proposed various inaudible attacks, but are limited by cost, distance, or LoS. Therefore, we…

Cryptography and Security · Computer Science 2026-03-26 Chao Liu , Zhezheng Zhu , Hao Chen , Kaiwen Guo , Penghao Wang , Xiang-Yang Li

Due to the popularity of Artificial Intelligence (AI) technology, numerous backdoor attacks are designed by adversaries to mislead deep neural network predictions by manipulating training samples and training processes. Although backdoor…

Computer Vision and Pattern Recognition · Computer Science 2023-10-20 Jun Xia , Zhihao Yue , Yingbo Zhou , Zhiwei Ling , Xian Wei , Mingsong Chen

This study investigates a primary inaudible attack vector on Amazon Alexa voice services using near ultrasound trojans and focuses on characterizing the attack surface and examining the practical implications of issuing inaudible voice…

Cryptography and Security · Computer Science 2023-05-24 Forrest McKee , David Noever

Businesses planning for the post-pandemic world are looking for innovative ways to protect the health and welfare of their employees and customers. Wireless technologies can play a key role in assisting contact tracing to quickly halt a…

Cryptography and Security · Computer Science 2020-07-10 Pai Chet Ng , Petros Spachos , Stefano Gregori , Konstantinos Plataniotis

Internet-of-Things (IoT) devices are nowadays massively integrated in daily life: homes, factories, or public places. This technology offers attractive services to improve the quality of life as well as new economic markets through the…

Cryptography and Security · Computer Science 2018-11-12 Jonathan Roux , Eric Alata , Guillaume Auriol , Mohamed Kaâniche , Vincent Nicomette , Romain Cayre

An ultrasonic Positioning System (UPS) has outperformed RF-based systems in terms of its accuracy for years. However, few of the developed solutions have been deployed in practice to satisfy the localization demand of today's smart devices,…

Networking and Internet Architecture · Computer Science 2018-12-11 Qiongzheng Lin , Zhenlin An , Lei Yang

Due to an increase in the availability of cheap off-the-shelf radio hardware, spoofing and replay attacks on satellite ground systems have become more accessible than ever. This is particularly a problem for legacy systems, many of which do…

Cryptography and Security · Computer Science 2023-09-08 Joshua Smailes , Sebastian Köhler , Simon Birnbach , Martin Strohmeier , Ivan Martinovic

The fusion of social networks and wearable sensors is becoming increasingly popular, with systems like Fitbit automating the process of reporting and sharing user fitness data. In this paper we show that while compelling, the integration of…

Cryptography and Security · Computer Science 2017-03-24 Mahmudur Rahman , Bogdan Carbunar , Madhusudan Banik

The paper applies reinforcement learning to novel Internet of Thing configurations. Our analysis of inaudible attacks on voice-activated devices confirms the alarming risk factor of 7.6 out of 10, underlining significant security…

Machine Learning · Computer Science 2023-07-26 Forrest McKee , David Noever

This study presents an in-depth analysis of the security landscape in Bluetooth Low Energy (BLE) tracking systems, with a particular emphasis on Apple AirTags and Samsung SmartTags, including their cryptographic frameworks. Our…

Cryptography and Security · Computer Science 2024-01-25 Hosam Alamleh , Michael Gogarty , David Ruddell , Ali Abdullah S. AlQahtani

The growing market for smart home IoT devices promises new conveniences for consumers while presenting new challenges for preserving privacy within the home. Many smart home devices have always-on sensors that capture users' offline…

Cryptography and Security · Computer Science 2017-08-18 Noah Apthorpe , Dillon Reisman , Srikanth Sundaresan , Arvind Narayanan , Nick Feamster
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