Property-Based Testing for Cybersecurity: Towards Automated Validation of Security Protocols

The validation of security protocols remains a complex and critical task in the cybersecurity landscape, often relying on labor-intensive testing or formal verification techniques with limited scalability. In this paper, we explore property-based testing (PBT) as a powerful yet underutilized methodology for the automated validation of security protocols. PBT enables the generation of large and diverse input spaces guided by declarative properties, making it well-suited to uncover subtle vulnerabilities in protocol logic, state transitions, and access control flows. We introduce the principles of PBT and demonstrate its applicability through selected use cases involving authentication mechanisms, cryptographic APIs, and session protocols. We further discuss integration strategies with existing security pipelines and highlight key challenges such as property specification, oracle design, and scalability. Finally, we outline future research directions aimed at bridging the gap between PBT and formal methods, with the goal of advancing the automation and reliability of secure system development.