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Currently, different forms of ransomware are increasingly threatening Internet users. Modern ransomware encrypts important user data and it is only possible to recover it once a ransom has been paid. In this paper we show how…

Cryptography and Security · Computer Science 2018-04-10 Krzysztof Cabaj , Wojciech Mazurczyk

Malware writers frequently try to hide the activities of their agents within tunnelled traffic. Within the Kill Chain model the infection time is often measured in seconds, and if the infection is not detected and blocked, the malware…

Cryptography and Security · Computer Science 2019-07-30 Peter McLaren , William J Buchanan , Gordon Russell , Zhiyuan Tan

Using automated reasoning, code synthesis, and contextual decision-making, we introduce a new threat that exploits large language models (LLMs) to autonomously plan, adapt, and execute the ransomware attack lifecycle. Ransomware 3.0…

Cryptography and Security · Computer Science 2025-08-29 Md Raz , Meet Udeshi , P. V. Sai Charan , Prashanth Krishnamurthy , Farshad Khorrami , Ramesh Karri

Detecting encryption-driven cyber threats remains a large challenge due to the evolving techniques employed to evade traditional detection mechanisms. An entropy-based computational framework was introduced to analyze multi-domain system…

Cryptography and Security · Computer Science 2025-03-27 Michael Mannon , Evan Statham , Quentin Featherstone , Sebastian Arkwright , Clive Fenwick , Gareth Willoughby

There is an increase in global malware threats. To address this, an encryption-type ransomware has been introduced on the Android operating system. The challenges associated with malicious threats in phone use have become a pressing issue…

Cryptography and Security · Computer Science 2025-10-30 Parick Ozoh , John K Omoniyi , Bukola Ibitoye

This study presents a critical review of disclosed, documented, and malicious cybersecurity incidents in the water sector to inform safeguarding efforts against cybersecurity threats. The review is presented within a technical context of…

Cryptography and Security · Computer Science 2020-07-28 Amin Hassanzadeh , Amin Rasekh , Stefano Galelli , Mohsen Aghashahi , Riccardo Taormina , Avi Ostfeld , Katherine Banks

Many damaging cybersecurity attacks are enabled when an attacker can access residual sensitive information (e.g. cryptographic keys, personal identifiers) left behind from earlier computation. Attackers can sometimes use residual…

Cryptography and Security · Computer Science 2021-06-21 Deborah Shands , Carolyn Talcott

We present in this work an economic analysis of ransomware, with relevant data from Cryptolocker, CryptoWall, TeslaCrypt and other major strands. We include a detailed study of the impact that different price discrimination strategies can…

Cryptography and Security · Computer Science 2017-03-21 Julio Hernandez-Castro , Edward Cartwright , Anna Stepanova

Cybersecurity training should be adaptable to evolving the cyber threat landscape, cost effective and integrated well with other enterprise management components. Unfortunately, very few cybersecurity training platforms can satisfy such…

Cryptography and Security · Computer Science 2018-12-12 Tam n. Nguyen , Lydia Sbityakov , Samantha Scoggins

Ransomware attacks are increasing at an alarming rate, leading to large financial losses, unrecoverable encrypted data, data leakage, and privacy concerns. The prompt detection of ransomware attacks is required to minimize further damage,…

Cryptography and Security · Computer Science 2022-05-31 Jurijs Nazarovs , Jack W. Stokes , Melissa Turcotte , Justin Carroll , Itai Grady

Attacks on information systems followed by intrusions may cause large revenue losses. The prevention of both is not always possible by just considering information from isolated sources of the network. A global view of the whole system is…

Cryptography and Security · Computer Science 2008-02-27 Joaquin Garcia-Alfaro , Michael A. Jaeger , Gero Muehl , Joan Borrell

The increasing sophistication of encryption-based ransomware has demanded innovative approaches to detection and mitigation, prompting the development of a hierarchical framework grounded in probabilistic cryptographic analysis. By focusing…

Cryptography and Security · Computer Science 2025-08-11 Kevin Pekepok , Persephone Kirkwood , Esme Christopolous , Florence Braithwaite , Oliver Nightingale

Decentralized systems, such as distributed ledgers and the InterPlanetary File System (IPFS), are designed to offer more open and robust services. However, they also create opportunities for illegal activities. We demonstrate how these…

Cryptography and Security · Computer Science 2020-03-11 Christos Karapapas , Iakovos Pittaras , Nikos Fotiou , George C. Polyzos

As AI agents become more widely deployed, we are likely to see an increasing number of incidents: events involving AI agent use that directly or indirectly cause harm. For example, agents could be prompt-injected to exfiltrate private…

Computers and Society · Computer Science 2025-08-21 Carson Ezell , Xavier Roberts-Gaal , Alan Chan

Ransomware, a class of self-propagating malware that uses encryption to hold the victims' data ransom, has emerged in recent years as one of the most dangerous cyber threats, with widespread damage; e.g., zero-day ransomware WannaCry has…

Cryptography and Security · Computer Science 2017-09-27 Qian Chen , Robert A. Bridges

Ransomware defense solutions that can quickly detect and classify different ransomware classes to formulate rapid response plans have been in high demand in recent years. Though the applicability of adopting deep learning techniques to…

Cryptography and Security · Computer Science 2022-04-12 Jinting Zhu , Julian Jang-Jaccard , Amardeep Singh , Ian Welch , Harith AI-Sahaf , Seyit Camtepe

Nowadays, both the amount of cyberattacks and their sophistication have considerably increased, and their prevention is of concern of most of organizations. Cooperation by means of information sharing is a promising strategy to address this…

Cryptography and Security · Computer Science 2016-08-01 Roberto Garrido-Pelaz , Lorena Gozalez-Manzano , Sergio Pastrana

A survey of machine learning techniques trained to detect ransomware is presented. This work builds upon the efforts of Taylor et al. in using sensor-based methods that utilize data collected from built-in instruments like CPU power and…

Machine Learning · Computer Science 2021-10-18 Erik Larsen , David Noever , Korey MacVittie

Ransomware poses a significant threat to individuals and organisations, compelling tools to investigate its behaviour and the effectiveness of mitigations. To answer this need, we present SAFARI, an open-source framework designed for safe…

Cryptography and Security · Computer Science 2025-04-11 Tommaso Compagnucci , Franco Callegati , Saverio Giallorenzo , Andrea Melis , Simone Melloni , Alessandro Vannini

Ransomware impact hinges on how easily an intruder can move laterally and spread to the maximum number of assets. We present a graph-theoretic formulation that casts lateral movement as a path-closure problem over a probability semiring to…

Discrete Mathematics · Computer Science 2025-11-10 Satyam Tyagi , Ganesh Murugesan
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