What is the purpose of layered security controls as described by SID?

Layered security controls, as emphasized by the Security Identification Document (SID), are designed to create multiple defensive barriers that collectively enhance the protection of sensitive information and systems. The primary purpose of these controls is to deter unauthorized entry by making it more difficult for potential intruders to gain access. When combined, these various layers serve to improve detection capabilities for any breaches that may occur, ensuring that any suspicious activities are caught and mitigated quickly.

This multi-faceted approach allows organizations to respond to security threats more effectively, as each layer provides a different form of defense. For instance, physical security measures might work alongside technical controls such as firewalls and intrusion detection systems. This synergy ensures a more robust security posture, where if one layer fails, others still provide protection.

The other choices focus on aspects that do not directly relate to the core purpose of layered security controls. Automating security processes can be a function of layered security but is not its primary purpose. Managing workforce security clearances is a different scope of security related to personnel rather than the overall structural defense against unauthorized access. Streamlining operational procedures, while beneficial for efficiency, does not inherently contribute to the security objectives that layered controls aim to achieve.