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Adversarial attacks have always been a serious threat for any data-driven model. In this paper, we explore subspaces of adversarial examples in unitary vector domain, and we propose a novel detector for defending our models trained for…

Machine Learning · Computer Science 2019-10-29 Mohammad Esmaeilpour , Patrick Cardinal , Alessandro Lameiras Koerich

Sound event localization and detection (SELD) is a combined task of identifying the sound event and its direction. Deep neural networks (DNNs) are utilized to associate them with the sound signals observed by a microphone array. Although…

Audio and Speech Processing · Electrical Eng. & Systems 2022-02-18 Kento Nagatomo , Masahiro Yasuda , Kohei Yatabe , Shoichiro Saito , Yasuhiro Oikawa

Sensors are embedded in security-critical applications from medical devices to nuclear power plants, but their outputs can be spoofed through electromagnetic and other types of signals transmitted by attackers at a distance. To address the…

Cryptography and Security · Computer Science 2019-11-12 Ilias Giechaskiel , Youqian Zhang , Kasper B. Rasmussen

The radical advances in telecommunications and computer science have enabled a myriad of applications and novel seamless interaction with computing interfaces. Voice Assistants (VAs) have become a norm for smartphones, and millions of VAs…

Cryptography and Security · Computer Science 2023-02-22 Domna Bilika , Nikoletta Michopoulou , Efthimios Alepis , Constantinos Patsakis

Adversarial attack approaches to speaker identification either need high computational cost or are not very effective, to our knowledge. To address this issue, in this paper, we propose a novel generation-network-based approach, called…

Sound · Computer Science 2023-02-28 Jiadi Yao , Xing Chen , Xiao-Lei Zhang , Wei-Qiang Zhang , Kunde Yang

With the development of deep learning, speech enhancement has been greatly optimized in terms of speech quality. Previous methods typically focus on the discriminative supervised learning or generative modeling, which tends to introduce…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-31 Nan Xu , Zhaolong Huang , Xiaonan Zhi

Distributed Volt-Var Control (VVC) is a widely used control mode of smart inverters. However, necessary VVC curve parameters are remotely communicated to the smart inverter, which opens doors for cyberattacks. If the VVC curves of an…

Systems and Control · Electrical Eng. & Systems 2023-09-20 Ahmad Mohammad Saber , Amr Youssef , Davor Svetinovic , Hatem Zeineldin , Ehab El-Saadany

To improve speech intelligibility and speech quality in noisy environments, binaural noise reduction algorithms for head-mounted assistive listening devices are of crucial importance. Several binaural noise reduction algorithms such as the…

Audio and Speech Processing · Electrical Eng. & Systems 2022-11-15 Marvin Tammen , Simon Doclo

Large Vision-Language Models (LVLMs) are vulnerable to a growing array of multimodal jailbreak attacks, necessitating defenses that are both generalizable to novel threats and efficient for practical deployment. Many current strategies fall…

Cryptography and Security · Computer Science 2026-04-21 Peichun Hua , Hao Li , Shanghao Shi , Zhiyuan Yu , Ning Zhang

Scanning tunneling microscopy (STM) and micro-electromechanical systems (MEMS) have traditionally addressed vastly different length scales - one resolving atoms, the other engineering macroscopic motion. Here we unite these two fields to…

Mesoscale and Nanoscale Physics · Physics 2026-01-09 R. J. G. Elbertse , M. Xu , A. Keşkekler , S. Otte , R. A. Norte

Now-a-days, speech-based biometric systems such as automatic speaker verification (ASV) are highly prone to spoofing attacks by an imposture. With recent development in various voice conversion (VC) and speech synthesis (SS) algorithms,…

Sound · Computer Science 2016-11-18 Dipjyoti Paul , Monisankha Pal , Goutam Saha

Visible light communication (VLC) has the potential to supplement the growing demand for wireless connectivity. In order to realise the full potential of VLC, channel models are required Discrete channel models based on semi-hidden Markov…

Signal Processing · Electrical Eng. & Systems 2019-02-20 Daniel G. Holmes , Ling Cheng , Mulundumina Shimaponda-Nawa , Ayokunle D. Familua , Adnan M. Abu-Mahfouz

Speech recognition is a sequence prediction problem. Besides employing various deep learning approaches for framelevel classification, sequence-level discriminative training has been proved to be indispensable to achieve the…

Computation and Language · Computer Science 2018-08-20 Zhehuai Chen , Yanmin Qian , Kai Yu

We present Malafide, a universal adversarial attack against automatic speaker verification (ASV) spoofing countermeasures (CMs). By introducing convolutional noise using an optimised linear time-invariant filter, Malafide attacks can be…

Audio and Speech Processing · Electrical Eng. & Systems 2023-06-14 Michele Panariello , Wanying Ge , Hemlata Tak , Massimiliano Todisco , Nicholas Evans

With the advancement of AI-based speech synthesis technologies such as Deep Voice, there is an increasing risk of voice spoofing attacks, including voice phishing and fake news, through unauthorized use of others' voices. Existing defenses…

Machine Learning · Computer Science 2025-05-20 Seungmin Kim , Sohee Park , Donghyun Kim , Jisu Lee , Daeseon Choi

In this paper we propose a method for defending against an eavesdropper that uses a Deep Neural Network (DNN) for learning the modulation of wireless communication signals. Our method is based on manipulating the emitted waveform with the…

Cryptography and Security · Computer Science 2023-10-04 Dimitrios Varkatzas , Antonios Argyriou

Vision-Language Models (VLMs) are increasingly used as perceptual modules for visual content reasoning, including through captioning and DeepFake detection. In this work, we expose a critical vulnerability of VLMs when exposed to subtle,…

Computer Vision and Pattern Recognition · Computer Science 2025-08-14 Jordan Vice , Naveed Akhtar , Yansong Gao , Richard Hartley , Ajmal Mian

Diffusion models (DMs) have achieved state-of-the-art performance on various generative tasks such as image synthesis, text-to-image, and text-guided image-to-image generation. However, the more powerful the DMs, the more harmful they…

Cryptography and Security · Computer Science 2024-08-08 Vu Tuan Truong , Luan Ba Dang , Long Bao Le

The widespread smart devices raise people's concerns of being eavesdropped on. To enhance voice privacy, recent studies exploit the nonlinearity in microphone to jam audio recorders with inaudible ultrasound. However, existing solutions…

Cryptography and Security · Computer Science 2024-01-30 Peng Huang , Yao Wei , Peng Cheng , Zhongjie Ba , Li Lu , Feng Lin , Yang Wang , Kui Ren

In neuromorphic engineering, computation is commonly performed asynchronously, mimicking the way in which nervous systems process information: spike by spike. The Neuromorphic Auditory Sensor (NAS) has been implemented under this principle:…

Audio and Speech Processing · Electrical Eng. & Systems 2024-10-30 Angel Jimenez-Fernandez , Daniel Gutierrez-Galan , Antonio Rios-Navarro , Juan Pedro Dominguez-Morales , Gabriel Jimenez-Moreno