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Agentic systems based on large language models (LLMs) operate not merely as text generators but as autonomous entities that dynamically retrieve information and invoke tools. This execution model shifts the attack surface from traditional…

Cryptography and Security · Computer Science 2026-04-21 Xiaochong Jiang , Shiqi Yang , Wenting Yang , Yichen Liu , Cheng Ji

Nowadays, there is a plethora of services that are provided and paid for online, like video streaming subscriptions, car or parking sharing, purchasing tickets for events, etc. Online services usually issue tokens directly related to the…

Cryptography and Security · Computer Science 2022-02-21 Xavier Salleras , Sergi Rovira , Vanesa Daza

The rapid advancement of quantum computing poses a significant threat to many current security algorithms used for secure communication, digital authentication, and information encryption. A sufficiently powerful quantum computer could…

Cryptography and Security · Computer Science 2024-07-19 Basel Halak , Cristian Sebastian Csete , Edward Joyce , Jack Papaioannou , Alexandre Pires , Jin Soma , Betul Gokkaya , Michael Murphy

Modern agentic systems allow Large Language Model (LLM) agents to tackle complex tasks through extensive tool usage, forming structured control flows of tool selection and execution. Existing security analyses often treat these control…

Cryptography and Security · Computer Science 2026-05-12 Zhenlin Xu , Xiaogang Zhu , Yu Yao , Minhui Xue , Yiliao Song

Very recently, Barman et al. proposed a multi-server authentication protocol using fuzzy commitment. The authors claimed that their protocol provides anonymity while resisting all known attacks. In this paper, we analyze that Barman et…

Cryptography and Security · Computer Science 2020-04-17 Hafeez Ur Rehman , Anwar Ghani , Shehzad Ashraf Chaudhry , Mohammed H. Alsharif , Narjes Nabipour

User authentication can rely on various factors (e.g., a password, a cryptographic key, biometric data) but should not reveal any secret or private information. This seemingly paradoxical feat can be achieved through zero-knowledge proofs.…

Cryptography and Security · Computer Science 2020-09-15 Laurent Chuat , Sarah Plocher , Adrian Perrig

As researchers continue to optimize AI agents for more effective task execution within operating systems, they often overlook a critical security concern: the ability of these agents to detect "impostors" within their environment. Through…

Computation and Language · Computer Science 2025-08-07 Yurun Chen , Xavier Hu , Keting Yin , Juncheng Li , Shengyu Zhang

As large language models (LLMs) expose systemic security challenges in high risk applications, including privacy leaks, bias amplification, and malicious abuse, there is an urgent need for a dynamic risk assessment and collaborative defence…

Cryptography and Security · Computer Science 2026-02-05 Xiaoyan Zhang , Dongyang Lyu , Xiaoqi Li

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

The ongoing penetration of energy systems with information and communications technology (ICT) and the introduction of new markets increase the potential for malicious or profit-driven attacks that endanger system stability. To ensure…

Cryptography and Security · Computer Science 2024-03-27 Thomas Wolgast , Nils Wenninghoff , Stephan Balduin , Eric Veith , Bastian Fraune , Torben Woltjen , Astrid Nieße

Attackers increasingly, and with high success rates, use social engineering techniques to circumvent second factor authentication (2FA) technologies, compromise user accounts and sidestep fraud detection technologies. We introduce a social…

Cryptography and Security · Computer Science 2020-01-20 Markus Jakobsson

Autonomous agent frameworks built upon large language models (LLMs) are evolving into complex, tool-integrated, and continuously operating systems, introducing security risks beyond traditional prompt-level vulnerabilities. As this paradigm…

Cryptography and Security · Computer Science 2026-05-01 Luyao Xu , Xiang Chen

Email breaches are commonplace, and they expose a wealth of personal, business, and political data that may have devastating consequences. The current email system allows any attacker who gains access to your email to prove the authenticity…

Cryptography and Security · Computer Science 2019-04-16 Michael Specter , Sunoo Park , Matthew Green

Advancement in communication technology provides a scalable platform for various services where a remote user can access the server from anywhere without moving from its place. It has provided a unique opportunity for online services, such…

Cryptography and Security · Computer Science 2014-01-21 Dheerendra Mishra

The high complexity of DNS poses unique challenges for ensuring its security and reliability. Despite continuous advances in DNS testing, monitoring, and verification, protocol-level defects still give rise to numerous bugs and attacks. In…

Cryptography and Security · Computer Science 2024-11-21 Dhruv Nevatia , Si Liu , David Basin

This work addresses JavaScript malware detection to enhance client-side web application security with a behavior-based system. The ability to detect malicious JavaScript execution sequences is a critical problem in modern web security as…

Cryptography and Security · Computer Science 2025-05-28 Pedro Pereira , José Gonçalves , João Vitorino , Eva Maia , Isabel Praça

Choosing authentication schemes for a specific purpose is challenging for service providers, developers, and researchers. Previous ratings of technical and objective aspects showed that available schemes all have strengths and limitations.…

Human-Computer Interaction · Computer Science 2022-09-29 Verena Zimmermann , Paul Gerber , Alina Stöver

User authentication is one of the most important part of information security. Computer security most commonly depends on passwords to authenticate human users. Password authentication systems will be either been usable but not secure, or…

Cryptography and Security · Computer Science 2013-11-19 Gloriya Mathew , Shiney Thomas

Mobile banking applications have gained popularity and have significantly revolutionised the banking industry. Despite the convenience offered by M-Banking Apps, users are often distrustful of the security of the applications due to an…

Human-Computer Interaction · Computer Science 2025-08-26 Richard Apaua , Harjinder Singh Lallie

QUIC protocol is primarily designed to optimize web performance and security. However, previous research has pointed out that it is vulnerable to handshake flooding attacks. Attackers can send excessive volume of handshaking requests to…

Cryptography and Security · Computer Science 2024-12-13 Abdollah Jabbari , Y A Joarder , Benjamin Teyssier , Carol Fung