The primary function of a baseline in security protocols is to establish a minimum standard of security measures and controls that must be implemented to protect information systems. Baselines serve as a foundational guideline for security policies and procedures, ensuring consistency and compliance across an organization. They identify essential security requirements to mitigate risks, protect sensitive data, and maintain overall system integrity. By creating a baseline, organizations can assess their security posture, address vulnerabilities, and adopt best practices to enhance their cybersecurity frameworks.