The Security Readiness Checklist is a tool used to assess an organization's security posture. It is used to identify areas of vulnerability and to develop a plan of action to increase security. The checklist includes topics such as physical security, network security, authentication procedures, patch management, and incident response. It also covers administrative policies and procedures, training programs, and internal auditing. The checklist can be used as a starting point for a comprehensive security audit and can help organizations ensure that their security posture is up to date and able to meet the ever-changing threat landscape.