Deck 4: Access Control

Question 1

A constraint is a defined relationship among roles or a condition related toroles.

Answer 1

True

Question 2

__________ is verification that the credentials of a user or other system entity are valid.

A) Adequacy
B) Authentication
C) Authorization
D) Audit

Answer 2

B

Question 3

__________ implements a security policy that specifies who or what may have access to each specific system resource and the type of access that is permitted in each instance.

A) Audit control
B) Resource control
C) System control
D) Access control

Answer 3

D

Question 4

An ABAC model can define authorizations that express conditions onproperties of both the resource and the subject.

Question 5

Access control is the central element of computer security.

Question 6

A user may belong to multiple groups.

Question 7

Any program that is owned by, and SetUID to, the "superuser" potentiallygrants unrestricted access to the system to any user executing that program.

Question 8

External devices such as firewalls cannot provide access control services.

Question 9

The default set of rights should always follow the rule of least privilege orread-only access

Question 10

__________ controls access based on comparing security labels with security clearances.

A) MAC
B) DAC
C) RBAC
D) MBAC

Question 11

__________ is the traditional method of implementing access control.

A) MAC
B) RBAC
C) DAC
D) MBAC

Question 12

Traditional RBAC systems define the access rights of individual users andgroups of users.

Question 13

_________ is the granting of a right or permission to a system entity to access a system resource.

A) Authorization
B) Authentication
C) Control
D) Monitoring

Question 14

An access right describes the way in which a subject may access an object.

Question 15

The principal objectives of computer security are to preventunauthorized users from gaining access to resources, to prevent legitimate users from accessing resources in an unauthorized manner, and to enable legitimate users to access resources in an authorized manner.

Question 16

The authentication function determines who is trusted for a given purpose.

Question 17

An auditing function monitors and keeps a record of user accesses tosystem resources.

Question 18

Reliable input is an access control requirement.

Question 19

A user program executes in a kernel mode in which certain areas of memoryare protected from the user's use and certain instructions may not be executed.

Question 20

Security labels indicate which system entities are eligible to access certainresources.

Question 21

A __________ is an entity capable of accessing objects.

A) group
B) object
C) subject
D) owner

Question 22

A(n) __________ is a resource to which access is controlled.

A) object
B) owner
C) world
D) subject

Question 23

__________ access control controls access based on the roles that users have within the system and on rules stating what accesses are allowed to users in given roles.

Question 24

Role hierarchies make use of the concept of __________ to enable one role to implicitly include access rights associated with a subordinate role.

Question 25

X.800 defines __________ as the prevention of unauthorized use of a resource,including the prevention of use of a resource in an unauthorized manner.

Question 26

A __________ is a named job function within the organization that controls this computer system.

A) user
B) role
C) permission
D) session

Question 27

__________ is based on the roles the users assume in a system rather than the user's identity.

A) DAC
B) RBAC
C) MAC
D) URAC

Question 28

__________ refers to setting a maximum number with respect to roles.

A) Cardinality
B) Prerequisite
C) Exclusive
D) Hierarchy

Question 29

Basic access control systems typically define three classes of subject: owner, __________ and world.

Question 30

__________ provide a means of adapting RBAC to the specifics of administrative and security policies in an organization.

A) Constraints
B) Mutually Exclusive Roles
C) Cardinality
D) Prerequisites

Question 31

The basic elements of access control are: subject, __________, and access right.

Question 32

The __________ user ID is exempt from the usual file access control constraints and has system wide access.

Question 33

__________ access control controls access based on the identity of the requestor and on access rules stating what requestors are or are not allowed to do.

Question 34

A __________ access control scheme is one in which an entity may be granted access rights that permit the entity, by its own volition, to enable another entity to access some resource.

Question 35

An independent review and examination of system records and activities in order to test for adequacy of system controls, to ensure compliance with established policy and operational procedures, to detect breaches in security, and to recommend any indicated changes in control, policy and procedures is a(n) __________ .

Question 36

Subject attributes, object attributes and environment attributes are the three types of attributes in the __________ model.

A) DSD
B) RBAC
C) ABAC
D) SSD

Question 37

The __________ component deals with the management and control of theways entities are granted access to resources.

A) resource management
B) access management
C) privilege management
D) policy management ¸

Question 38

A concept that evolved out of requirements for military information security is ______ .

A) reliable input
B) mandatory access control
C) open and closed policies
D) discretionary input

Question 39

A __________ is a mapping between a user and an activated subset of the set of roles to which the user is assigned.

Question 40

The final permission bit is the _________ bit.

A) superuser
B) kernel
C) set user
D) sticky

Question 41

The three types of attributes in the ABAC model are subject attributes, object attributes, and _________ attributes.

Question 42

A __________ is an object or data structure that authoritatively binds an identity to a token possessed and controlled by a subscriber.

Question 43

A __________ dictates that a user can only be assigned to a particular role if it is already assigned to some other specified role and can be used to structure the implementation of the least privilege concept.

Question 44

In digital identity systems, a __________ functions as a certification program.

Question 45

There are three key elements to an ABAC model: attributes which are defined for entities in a configuration; a policy model, which defines the ABAC policies; and the __________ model, which applies to policies that enforce access control.