In the domain of cybersecurity,Interoperabilityis generally not considered a "building block" of security itself; in fact, in many critical infrastructure contexts, interoperability can actuallyincreasevulnerability if not managed correctly. While interoperability is a foundational goal forEmergency Communications(allowing different radios to talk to each other), in cybersecurity, the focus is onSegmentationandAccess Control.
The actual building blocks of a robust cybersecurity strategy, as outlined by theNIST Cybersecurity Framework, include:
Encryption (Option C):Protecting data at rest and in transit so that it cannot be read by unauthorized parties.
Automation (Option A):Using automated tools for threat detection, patch management, and incident response to keep up with the speed of modern cyber-attacks.
Authentication:Verifying the identity of users and devices.
Interoperability (Option B) refers to the ability of different systems to exchange and use information. While important for business efficiency and disaster coordination, it often creates "lateral movement" opportunities for hackers. If a public works water system is highly interoperable with the city’s general Wi-Fi network, a breach in the Wi-Fi could lead to a breach in the water controls.
For theCEDPcandidate, it is crucial to distinguish between "Information Management" goals and "Security" goals. While we want systems to talk to each other during a disaster (Interoperability), we must secure those connections through encryption and monitor them through automation. Therefore, interoperability is anoperationalrequirement that cybersecurity mustprotect, but it is not a tool used tocreatesecurity.