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Abnormal event detection is a challenging task that requires effectively handling intricate features of appearance and motion. In this paper, we present an approach of detecting anomalies in videos by learning a novel LSTM based…

Computer Vision and Pattern Recognition · Computer Science 2021-04-06 Habtamu Fanta , Zhiwen Shao , Lizhuang Ma

An intrusion detection system framework using mobile agents is a layered framework mechanism designed to support heterogeneous network environments to identify intruders at its best. Traditional computer misuse detection techniques can…

Networking and Internet Architecture · Computer Science 2010-07-15 N. Jaisankar , R. Saravanan , K. Durai Swamy

Location-based service (LBS) applications proliferate and support transportation, entertainment, and more. Modern mobile platforms, with smartphones being a prominent example, rely on terrestrial and satellite infrastructures (e.g., global…

Cryptography and Security · Computer Science 2025-05-16 Wenjie Liu , Panos Papadimitratos

There is a research field of human activity recognition that automatically recognizes a user's physical activity through sensing technology incorporated in smartphones and other devices. When sensing daily activity, various measurement…

Human-Computer Interaction · Computer Science 2021-01-05 Tatsuhito Hasegawa

Botnets are becoming increasingly prevalent as the primary enabling technology in a variety of malicious campaigns such as email spam, click fraud, distributed denial-of-service (DDoS) attacks, and cryptocurrency mining. Botnet technology…

Cryptography and Security · Computer Science 2019-08-12 Kapil Sinha , Arun Viswanathan , Julian Bunn

Stacked intelligent metasurfaces (SIMs), composed of multiple layers of reconfigurable transmissive metasurfaces, are gaining prominence as a transformative technology for future wireless communication security. This paper investigates the…

Information Theory · Computer Science 2026-02-03 Enyu Shi , Yiyang Zhu , Jiayi Zhang , Ziheng Liu , Jiakang Zheng , Jiancheng An , Derrick Wing Kwan Ng , Bo Ai , Chau Yuen

The number of mobile and IoT devices connected to home and enterprise networks is growing fast. These devices offer new services and experiences for the users; however, they also present new classes of security threats pertaining to data…

Cryptography and Security · Computer Science 2017-12-22 Ibbad Hafeez , Aaron Yi Ding , Sasu Tarkoma

With the increased popularity of smartphones, various security threats and privacy leakages targeting them are discovered and investigated. In this work, we present \ourprotocoltight, a framework to authenticate users silently and…

Cryptography and Security · Computer Science 2013-09-03 Cheng Bo , Lan Zhang , Xiang-Yang Li

We introduce LTrack, a new tracking attack on LTE that allows an attacker to stealthily extract user devices' locations and permanent identifiers (IMSI). To remain stealthy, the localization of devices in LTrack is fully passive, relying on…

Cryptography and Security · Computer Science 2021-10-06 Martin Kotuliak , Simon Erni , Patrick Leu , Marc Roeschlin , Srdjan Capkun

Malicious encryption techniques continue to evolve, bypassing conventional detection mechanisms that rely on static signatures or predefined behavioral rules. Spectral analysis presents an alternative approach that transforms system…

Cryptography and Security · Computer Science 2025-03-26 Dominica Ayanara , Atticus Hillingworth , Jonathan Casselbury , Dominic Montague

The emerging massive/large-scale MIMO (LS-MIMO) systems relying on very large antenna arrays have become a hot topic of wireless communications. Compared to the LTE based 4G mobile communication system that allows for up to 8 antenna…

Information Theory · Computer Science 2015-11-24 Shaoshi Yang , Lajos Hanzo

The increasing ubiquity of low-cost wireless sensors has enabled users to easily deploy systems to remotely monitor and control their environments. However, this raises privacy concerns for third-party occupants, such as a hotel room guest…

Cryptography and Security · Computer Science 2021-04-20 Akash Deep Singh , Luis Garcia , Joseph Noor , Mani Srivastava

The growing popularity of smart mobile devices such as smartphones and tablets has made them an attractive target for cyber-criminals, resulting in a rapidly growing and evolving mobile threat as attackers experiment with new business…

Networking and Internet Architecture · Computer Science 2013-07-03 Erol Gelenbe , Gokce Gorbil , Dimitrios Tzovaras , Steffen Liebergeld , David Garcia , Madalina Baltatu , George Lyberopoulos

Face authentication usually utilizes deep learning models to verify users with high recognition accuracy. However, face authentication systems are vulnerable to various attacks that cheat the models by manipulating the digital counterparts…

Cryptography and Security · Computer Science 2021-06-16 Man Zhou , Qian Wang , Qi Li , Peipei Jiang , Jingxiao Yang , Chao Shen , Cong Wang , Shouhong Ding

Speech Activity Detection (SAD), locating speech segments within an audio recording, is a main part of most speech technology applications. Robust SAD is usually more difficult in noisy conditions with varying signal-to-noise ratios (SNR).…

Sound · Computer Science 2021-06-22 Omid Ghahabi , Volker Fischer

Smartphones and tablets have become ubiquitous in our daily lives. Smartphones, in particular, have become more than personal assistants. These devices have provided new avenues for consumers to play, work, and socialize whenever and…

Cryptography and Security · Computer Science 2019-11-12 Abdulaziz Alzubaidi , Jugal Kalita

SIEM systems serve as a critical hub, employing rule-based logic to detect and respond to threats. Redundant or overlapping rules in SIEM systems lead to excessive false alerts, degrading analyst performance due to alert fatigue, and…

Cryptography and Security · Computer Science 2025-05-13 Akansha Shukla , Parth Atulbhai Gandhi , Yuval Elovici , Asaf Shabtai

With increasingly sophisticated cyber-adversaries able to access a wider repertoire of mechanisms to implant malware such as ransomware, CPU/GPU keyloggers, and stealthy kernel rootkits, there is an urgent need for techniques to detect and…

Cryptography and Security · Computer Science 2025-01-23 Farshad Khorrami , Ramesh Karri , Prashanth Krishnamurthy

Embedded devices are omnipresent in modern networks including the ones operating inside critical environments. However, due to their constrained nature, novel mechanisms are required to provide external, and non-intrusive anomaly detection.…

Cryptography and Security · Computer Science 2023-02-07 Kurt A. Vedros , Georgios Michail Makrakis , Constantinos Kolias , Robert C. Ivans , Craig Rieger

Smartphones have ubiquitously integrated into our home and work environments, however, users normally rely on explicit but inefficient identification processes in a controlled environment. Therefore, when a device is stolen, a thief can…

Cryptography and Security · Computer Science 2020-09-25 Muhammad Ahmad , Ali Kashif Bashir , Adil Mehmood Khan , Manuel Mazzara , Salvatore Distefano , Shahzad Sarfraz