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Capacitive touchscreens in modern smartphones introduce severe side-channel vulnerabilities. However, existing attacks often require restrictive conditions or invasive measurements. This paper presents TESLA, a novel, contactless…

Cryptography and Security · Computer Science 2026-05-15 Yukun Cheng , Changhai Ou , Shiyu Zhu , Jinyuan Zhang , Zhenfang Qiu , Xingshuo Han , Tianwei Zhang , Yuan Li , Shihui Zheng

In this work, we address the problem of eavesdropping on digital video displays by analyzing the electromagnetic waves that unintentionally emanate from the cables and connectors, particularly HDMI. This problem is known as TEMPEST.…

Cryptography and Security · Computer Science 2024-07-16 Santiago Fernández , Emilio Martínez , Gabriel Varela , Pablo Musé , Federico Larroca

This paper reveals and exploits a critical security vulnerability: the electromagnetic (EM) side channel of capacitive touchscreens leaks sufficient information to recover fine-grained, continuous handwriting trajectories. We present…

Cryptography and Security · Computer Science 2026-05-22 Yukun Cheng , Shiyu Zhu , Changhai Ou , Xingshuo Han , Yuan Li , Shihui Zheng

In this work, we study the interface of the Brazilian e-Voting Machine (BVM) in the context of electromagnetic side-channel threats commonly referred to as TEMPEST attacks. In a TEMPEST attack against video displays, an eavesdropper uses…

Cryptography and Security · Computer Science 2026-05-26 Leonardo Teodoro , Kemuel L. Vieira , Saulo Queiroz

Mobile edge computing (MEC) is a promising approach for enabling cloud-computing capabilities at the edge of cellular networks. Nonetheless, security is becoming an increasingly important issue in MEC-based applications. In this paper, we…

Cryptography and Security · Computer Science 2017-09-26 Yuanfang Chen , Yan Zhang , Sabita Maharjan

This paper proposes an upgraded electro-magnetic side-channel attack that automatically reconstructs the intercepted data. A novel system is introduced, running in parallel with leakage signal interception and catching compromising data in…

Cryptography and Security · Computer Science 2020-04-29 Florian Lemarchand , Cyril Marlin , Florent Montreuil , Erwan Nogues , Maxime Pelcat

Electromagnetic (EM) covert channels pose significant threats to computer and communications security in air-gapped networks. Previous works exploit EM radiation from various components (e.g., video cables, memory buses, CPUs) to secretly…

Cryptography and Security · Computer Science 2025-06-27 Xieyang Sun , Yuanqing Zheng , Wei Xi , Zuhao Chen , Zhizhen Chen , Han Hao , Zhiping Jiang , Sheng Zhong

Screen lock is a critical security feature for smartphones to prevent unauthorized access. Although various screen unlocking technologies, including fingerprint and facial recognition, have been widely adopted, they still have some…

Cryptography and Security · Computer Science 2021-03-24 Boyu Fan , Xiang Su , Jianwei Niu , Pan Hui

Touchscreen-based electronic devices such as smart phones and smart tablets are widely used in our daily life. While the security of electronic devices have been heavily investigated recently, the resilience of touchscreens against various…

Cryptography and Security · Computer Science 2024-02-06 Haoqi Shan , Boyi Zhang , Zihao Zhan , Dean Sullivan , Shuo Wang , Yier Jin

Physical layer authentication relies on detecting unique imperfections in signals transmitted by radio devices to isolate their fingerprint. Recently, deep learning-based authenticators have increasingly been proposed to classify devices…

Cryptography and Security · Computer Science 2020-11-04 Samurdhi Karunaratne , Enes Krijestorac , Danijela Cabric

People use mobile devices ubiquitously for computing, communication, storage, web browsing, and more. As a result, the information accessed and stored within mobile devices, such as financial and health information, text messages, and…

Cryptography and Security · Computer Science 2023-08-09 Brian Tang , Kang G. Shin

Air-gapped computers are systems that are kept isolated from the Internet since they store or process sensitive information. In this paper, we introduce an optical covert channel in which an attacker can leak (or, exfiltlrate) sensitive…

Cryptography and Security · Computer Science 2020-02-05 Mordechai Guri , Dima Bykhovsky , Yuval Elovici

A previously unknown form of compromising emanations has been discovered. LED status indicators on data communication equipment, under certain conditions, are shown to carry a modulated optical signal that is significantly correlated with…

Cryptography and Security · Computer Science 2023-07-17 Joe Loughry , David A. Umphress

Physical isolation from external networks - an airgap - aims to minimize exposure to remote attacks. Yet capable adversaries still achieve code execution on air-gapped systems, and prior work has shown that they can then wirelessly…

Cryptography and Security · Computer Science 2026-05-05 Paul Staat , Daniel Davidovich , Christof Paar

It is known that malware can leak data from isolated, air-gapped computers to nearby smartphones using ultrasonic waves. However, this covert channel requires access to the smartphone's microphone, which is highly protected in Android OS…

Cryptography and Security · Computer Science 2022-08-23 Mordechai Guri

As the Internet of Things (IoT) continues to evolve, smartphones have become essential components of IoT systems. However, with the increasing amount of personal information stored on smartphones, user privacy is at risk of being…

Cryptography and Security · Computer Science 2023-07-26 Quancheng Wang , Ming Tang , Jianming Fu

Surface electromyography (EMG) enables non-invasive human-computer interaction in rehabilitation, prosthetics, and virtual reality. While deep learning models achieve over 97% classification accuracy, their vulnerability to adversarial…

Cryptography and Security · Computer Science 2025-07-30 Hongyi Xie

Steganography conceals the secret message into the cover media, generating a stego media which can be transmitted on public channels without drawing suspicion. As its countermeasure, steganalysis mainly aims to detect whether the secret…

Cryptography and Security · Computer Science 2022-05-26 Yong Xu , Zhihua Xia , Zichi Wang , Xinpeng Zhang , Jian Weng

Side-channel attacks on mobile devices have gained increasing attention since their introduction in 2007. While traditional side-channel attacks, such as power analysis attacks and electromagnetic analysis attacks, required physical…

Cryptography and Security · Computer Science 2017-12-08 Raphael Spreitzer , Veelasha Moonsamy , Thomas Korak , Stefan Mangard

Social engineering (SE) aims at deceiving users into performing actions that may compromise their security and privacy. These threats exploit weaknesses in human's decision making processes by using tactics such as pretext, baiting,…

Cryptography and Security · Computer Science 2024-01-12 Irfan Ozen , Karthika Subramani , Phani Vadrevu , Roberto Perdisci
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