What are goals of an Access Control System in an operating system? Select all that apply.

An Access Control System in an operating system is primarily aimed at regulating who or what can access or utilize resources in the system, thereby protecting sensitive information and ensuring that operations are conducted securely and efficiently.

Checking permissions on every access is essential for maintaining the integrity and confidentiality of data. This process ensures that only authorized users or processes can access specific resources, which helps prevent unauthorized actions that could compromise system security or lead to data breaches. By continuously checking permissions, the access control system can enforce security policies and monitor potential security violations in real-time.

Ensuring acceptable usage and enforcing least privilege are also important goals of an Access Control System. Acceptable usage guarantees that users adhere to defined rules and regulations while interacting with system resources, effectively minimizing potential misuse. Enforcing least privilege restricts users' access rights to the minimal level necessary for them to perform their job functions, reducing the risk of accidental or malicious exploitation.

While removing credible threats is a key objective in the broader context of an overall security strategy, it doesn't directly relate to the core functions of an access control system. Instead, the primary focus is on managing access through the mechanisms of permission checking, usage policies, and establishing trust boundaries.