Digital twins for security automation

K Hammar, R Stadler - NOMS 2023-2023 IEEE/IFIP Network …, 2023 - ieeexplore.ieee.org
We present a novel emulation system for creating high-fidelity digital twins of IT
infrastructures. The digital twins replicate key functionality of the corresponding …

Learning near-optimal intrusion responses against dynamic attackers

K Hammar, R Stadler - IEEE Transactions on Network and …, 2023 - ieeexplore.ieee.org
We study automated intrusion response and formulate the interaction between an attacker
and a defender as an optimal stop** game where attack and defense strategies evolve …

Learning security strategies through game play and optimal stop**

K Hammar, R Stadler - arxiv preprint arxiv:2205.14694, 2022 - arxiv.org
We study automated intrusion prevention using reinforcement learning. Following a novel
approach, we formulate the interaction between an attacker and a defender as an optimal …

Scalable learning of intrusion response through recursive decomposition

K Hammar, R Stadler - International Conference on Decision and Game …, 2023 - Springer
We study automated intrusion response for an IT infrastructure and formulate the interaction
between an attacker and a defender as a partially observed stochastic game. To solve the …

An online framework for adapting security policies in dynamic it environments

K Hammar, R Stadler - 2022 18th International Conference on …, 2022 - ieeexplore.ieee.org
We present an online framework for learning and updating security policies in dynamic IT
environments. It includes three components: a digital twin of the target system, which …

Optimal Security Response to Network Intrusions in IT Systems

K Hammar - arxiv preprint arxiv:2502.02541, 2025 - arxiv.org
Cybersecurity is one of the most pressing technological challenges of our time and requires
measures from all sectors of society. A key measure is automated security response, which …