Deep Reinforcement Learning Algorithms for Intrusion Detection: A Bibliometric Analysis and Systematic Review

Intrusion detection systems (IDSs) are crucial for safeguarding modern digital infrastructure against the ever-evolving cyber threats. As cyberattacks become increasingly complex, traditional machine learning (ML) algorithms, while remaining effective in classifying known threats, face limitations such as static learning, dependency on labeled data, and susceptibility to adversarial exploits. Deep reinforcement learning (DRL) has recently surfaced as a viable substitute, providing resilience in unanticipated circumstances, dynamic adaptation, and continuous learning. This study conducts a thorough bibliometric analysis and systematic literature review (SLR) of DRL-based intrusion detection systems (DRL-based IDS). The relevant literature from 2020 to 2024 was identified and investigated using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) framework. Emerging research themes, influential works, and structural relationships in the research fields were identified using a bibliometric analysis. SLR was used to synthesize methodological techniques, datasets, and performance analysis. The results indicate that DRL algorithms such as deep Q-network (DQN), double DQNs (DDQN), dueling DQN (D3QN), policy gradient methods, and actor–critic models have been actively utilized for enhancing IDS performance in various applications and datasets. The results highlight the increasing significance of DRL-based solutions for developing intelligent and robust intrusion detection systems and advancing cybersecurity.