WGU, Information Security and Assurance (C725), SET III

WGU, Information Security and Assurance (C725), SET III A job title: Have access to information resources in accordance with the owner-defined controls and access rules. - ✔✔Users One purpose of a security awareness ...

WGU, Information Security and Assurance (C725), SET III A job title: Have access to information resources in accordance with the owner-defined controls and access rules. - ✔✔Users One purpose of a security awareness program is to modify which of the following? A. Employees' attitudes and behaviors B. Management's approach C. Attitudes of employees toward sensitive data D. Corporate attitudes about safeguarding data - ✔✔A. Employees' attitudes and behaviors Explanation: Because people are the weakest link in any security-related process, it's crucial that a security program address user education, awareness, and training on policies and procedures that affect them. The totality of protection mechanisms within a computer system, including hardware, firmware, and software. It consists of one or more components that together enforce a unified security policy over a product or system - ✔✔Trusted Computing Base (TCB) A software model that mediates all access from any subject (user or other device) to any object (resource, data, and so forth); it cannot be bypassed.It mediates accesses to objects by subjects. In principle, it should be: Complete, to mediate every access Isolated from modification by other system entities (objects and processes) Verifiable, doing only what it's programmed to do and not being susceptible to circumvention by malicious acts or programmer error - ✔✔reference monitor a.k.a. abstract machine Implementation of a reference monitor for a specific hardware base, such as Sun Solaris, Red Hat Linux, or Mac OS X. - ✔✔security kernelThe TCB, reference monitor, and security kernel are essential for military- and government-grade information technology (IT) security to prevent unauthorized access or threats to the integrity of programs, operating systems, or data. T or F In "The ring of trust" Trust in a system moves from the outside to the inside in a unidirectional mode. - ✔✔True T or F Multics was the first operating system to provide a hierarchical file system - ✔✔True Which of the following terms best defines the sum of protection mechanisms inside the computer, including hardware, firmware, and software? A . Trusted system B .Security kernel C. Trusted computing base D. Security perimeter - ✔✔C. Trusted computing base Explanation: The Trusted Computing Base (TCB) is the totality of protection mechanisms within a computer system, including hardware, firmware, and software. A TCB practice in which a design objective in which each process has its own distinct address space for its application code and data. Such a design makes it possible to prevent each process from accessing another process's data. This prevents data or information leakage and prevents modification of the data while in memory. - ✔✔Process isolation A TCB practice in which a process (program) have no more privilege than what it really needs to perform its functions. Any modules that require supervisor or root access (that is, complete system privileges) are embedded in the operating system kernel. The kernel handles all requests for system resources and mediates the access from external modules to privileged modules when required. - ✔✔The principle of least privilege A TCB practice in which specifically relates to the segmentation of memory into protected segments. The kernel allocates the required amount of memory for the process to load its application code, its process data, and its application data. The system prevents user processes from accessing another process's allocated memory. It also prevents user processes from accessing system memory. - ✔✔Hardware segmentationA TCB practice in which process operation that is divided into layers by function. Each layer deals with a specific activity. The lower (outer) layers perform basic tasks, whereas the higher (inner) layers perform more complex or protected tasks. - ✔✔Layering A TCB practice in which a process that defines a specific set of permissible values for an object and the operations that are permissible on that object. This involves ignoring or separating implementation details to concentrate on what is important to maintain security. - ✔✔Abstraction A TCB practice in which a mechanism used to ensure that information available at one processing level is not available in another, regardless of whether it is higher or lower. It is also a concept in the object-oriented programming (OOP) technique when information is encapsulated within an object and can be directly manipulated only by the services provided within the object. - ✔✔Data hiding a.k.a. information hiding