Final answer:
The false statement regarding security measures is that they must occur at only three levels to be effective.
Security, including national and cybersecurity, is comprehensive and involves multiple layers and factors, spanning from physical deterrents to political stability and secure technologies.
Therefore, the correct answer is: option "security must occur only at three levels to be effective."
Step-by-step explanation:
Security is a multi-faceted concept that must occur at multiple levels. While the traditional focus of national security has been military might, it now includes economic, energy, and environmental security.
Non-state actors such as terrorists, narcotic cartels, and multinational corporations, along with natural disasters and other events, also represent security threats. It's a broad domain that covers the political aspect of security too, including stability and diplomatic interactions.
In terms of cybersecurity for individuals and organizations, measures like two-factor authentication, stronger passwords, and education to avoid scams are crucial. For nations, it requires a vast array of policies and strategies.
Therefore, claiming that security must occur at only three levels does not capture the complexity and the need for comprehensive strategies implicating physical, human, operation systems, and network security.