20 citations · 42 across the 8 of their papers we have counts for
11 papers · 1 filter
CYBERFORT: A Compliance-Chain Platform Operationalising the Cyber Resilience Act for SMEs
Nikolaos Kekatos, Georgios Koutidis, Mihaela Curcă +8
The EU Cyber Resilience Act (CRA) turns product cybersecurity into a lifecycle compliance obligation for manufacturers, importers, distributors, and integrators of products with di…
Constrained-Action AI Remediation for SIEM/XDR via a NeMo-Guardrails Proxy
Georgios Koutidis, Nikolaos Kekatos, Tom Nianios +1
Security Operations Centers (SOCs) for information technology and operational technology share one incident-response problem: a flood of correlated alerts and too few analysts. Lar…
Hybrid Hierarchical Runtime Verification for Edge-IoT Security: Combining MonPoly and RTLola
Nikolaos Kekatos, Marinelio Chintri, Panagiotis Katsaros +5
Security monitoring of edge-IoT fleets faces three structural challenges. (i) A per-node monitor is cheap but cannot see attacks that coordinate across devices. (ii) A cloud monito…
The algebraic classification of five-dimensional nilpotent right alternative algebras
Zohida Raxmatova, Aloberdi Sattarov
We develop the method of central extensions (the Skjelbred--Sund method) for nilpotent right alternative algebras over the field of complex numbers and apply it to obtain the algeb…
Formal Runtime Verification for Tool-Using LLM Agents: An Offline Same-Benchmark Study on AgentDojo and STAC
Nikolaos Kekatos, Stylianos Basagiannis, Marinelio Chintri +5
Guardrails for tool-using LLM agents are usually application-specific rules, which makes multi-step, data-dependent safety policies hard to specify, audit and reuse. As a declarati…
Multi-Aspect Runtime Verification for Simulation-Based V&V of LLM-Enabled Autonomous Agents
Nikolaos Kekatos, Dimitrios Nikou, Anastasios Temperekidis +4
LLM-based agents are entering decision-support roles in defence staff work, where the obligations they must respect are already written down and binding, and where retraining is no…
Explainable Rule Mining of IPv6 Extension-Header Presence Patterns from Paired-Vantage Captures
Priyanka Sinha, Nikolaos Kekatos, Stylianos Basagiannis +5
IPv6 extension headers (EHs), such as fragmentation, segment routing, and in-situ telemetry, are operationally important yetwidely dropped in transit, and characterising their beha…
Preparing an AI-Augmented SIEM for the EU Cyber Resilience Act: A Practitioner Case Study
Georgios Koutidis, Nikolaos Kekatos, Marina Korgiala-Karyda +2
The EU Cyber Resilience Act (CRA), Regulation (EU) 2024/2847, makes product cybersecurity a lifecycle obligation for products with digital elements on the EU market: risk assessmen…
The Amplifier Effect: Human-Factor Risks of AI-Suggested Correlation and Auto-Propagation in Multi-Framework GRC Self-Assessment
Nikolaos Kekatos, Michael Ioannou, Marina Korgiala-Karyda +2
Multi-framework Governance, Risk and Compliance (GRC) platforms increasingly automate the link between an organisation's self-assessment answer and the compliance obligations that…
A Resilient Runtime-Verification Fabric for Security Monitoring of Critical Edge-IoT Infrastructure
Nikolaos Kekatos, Marinelio Chintri, Panagiotis Katsaros +5
Protecting critical infrastructure increasingly depends on continuously verifying large IoT fleets against formal security specifications at runtime. Yet the runtime-verification (…
Mission-Level Runtime Assurance for LLM-Assisted ISR Swarms over a Verification-Aware Fabric
Nikolaos Kekatos, Michael Ioannou, Panagiotis Katsaros +4
Swarms of LLM-assisted autonomous robots are increasingly proposed for cooperative intelligence, surveillance, and reconnaissance (ISR) in contested environments. A growing class o…