Mechanism design and imperfect information -- Observable Perfect Equilibrium -- Playing Repeated Coopetitive Polymatrix Games with Small Manipulation Cost -- Rule Enforcing Through Ordering -- Security Games -- Multi-defender Security Games with Schedules -- Asymmetric Centrality Game against Network Epidemic Propagation -- Shades of Grey: Strategic Bimatrix Stopping Games for Modelling (Un)Ethical Hacking Roles -- Learning in security games -- Characterizing and Improving the Robustness of Predict-Then-Optimize Frameworks -- Quantisation Effects in Adversarial Cyber-Physical GamesTakuma Adams -- Scalable Learning of Intrusion Responses through Recursive Decomposition -- Cyber deception -- Honeypot Allocation for Cyber Deception in Dynamic Tactical Networks: A Game Theoretic Approach -- Optimal Resource Allocation for Proactive Defense with Deception in Probabilistic Attack Graphs -- The Credential is Not Enough: Combining Honeypots and Fake Credentials for Cyber-Defense -- Economics of security -- Does Cyber-insurance Benefit the Insured or the Attacker? -- A Game of Cyber-Insurance -- Rational Broadcast Protocols against Timid Adversaries -- FlipPath Game to Counter Stealthy Attacks in SDN-based Tactical Networks -- Information and privacy -- Double-sided Information Asymmetry in Double Extortion Ransomware -- Opacity-enforcing active perception and control against eavesdropping attacks -- A Game-Theoretic Analysis of Auditing Differentially Private Algorithms with Epistemically Disparate Herd -- Modeling and Analysis of a Nonlinear Security Game with Mixed Armament -- Short articles -- Incentive-Based Software Security: Fair Micro-Payments for Writing Secure Code -- Using Game Theory Approach for COVID-19 Risk Analysis and Medical Resource Allocation -- Shapley Value to Rank Vulnerabilities on Attack Graphs: Applications to Cyberdeception -- Solving security models with perfect observability.