OSSecurity
Everything on SkillVeris tagged OSSecurity — collected across the glossary, study notes, blog, and cheat sheets.
5 resources across 1 library
Interview Questions(5)
What Are the Basic Security Mechanisms in an Operating System?
An operating system enforces security through authentication (verifying who a user is), authorization (deciding what an authenticated user may do via permissio…
What Are Access Control Lists (ACLs) in an Operating System?
An access control list (ACL) is a per-object list of entries, each pairing a specific user or group with the permissions they hold on that object, giving finer…
What Is Capability-Based Security in an Operating System?
Capability-based security is an access control model where a process’s right to perform an operation on an object is represented by an unforgeable token, calle…
What Are Protection Rings in an Operating System?
Protection rings are hierarchical privilege levels enforced by the CPU, typically numbered from Ring 0 (most privileged, running the kernel) to Ring 3 (least p…
What Is the System Call Interface in an Operating System?
The system call interface is the well-defined, kernel-validated boundary through which a user-mode application requests privileged operations — like file I/O,…