COPYRIGHT TEST PAPERS - COPYRIGHT TRAINING FOR EXAM

copyright Test Papers - copyright Training For Exam

copyright Test Papers - copyright Training For Exam

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ISC copyright Security Professional (copyright) Sample Questions (Q624-Q629):

NEW QUESTION # 624
When reviewing vendor certifications for handling and processing of company data, which of the following is the BEST Service Organization Controls (SOC) certification for the vendor to possess?

  • A. SOC 3
  • B. SOC 1 Type 1
  • C. SOC 2 Type 2
  • D. SOC 2 Type 1

Answer: C


NEW QUESTION # 625
What is called a type of access control where a central authority determines what subjects can have access to certain objects, based on the organizational security policy?

  • A. Rule-based access control
  • B. Non-discretionary Access Control
  • C. Discretionary Access Control
  • D. Mandatory Access Control

Answer: B

Explanation:
Non-Discretionary Access Control. A central authority determines what subjects can have access to certain objects based on organizational security policy. The access controls may be based on the individual's role in the organization (role-based) or the subject's responsibilities and duties (task-based). Pg. 33 Krutz: The copyright Prep Guide.


NEW QUESTION # 626
Which access control model is also called Non Discretionary Access Control (NDAC)?

  • A. Mandatory access control
  • B. Label-based access control
  • C. Lattice based access control
  • D. Role-based access control

Answer: D

Explanation:
RBAC is sometimes also called non-discretionary access control (NDAC) (as Ferraiolo says "to distinguish it from the policy-based specifics of MAC"). Another model that fits within the NDAC category is Rule-Based Access Control (RuBAC or RBAC). Most of the copyright books use the same acronym for both models but NIST tend to use a lowercase "u" in between R and B to differentiate the two models.
You can certainly mimic MAC using RBAC but true MAC makes use of Labels which contains the sensitivity of the objects and the categories they belong to. No labels means MAC is not being used.
One of the most fundamental data access control decisions an organization must make is the amount of control it will give system and data owners to specify the level of access users of that data will have. In every organization there is a balancing point between the access controls enforced by organization and system policy and the ability for information owners to determine who can have access based on specific business requirements. The process of translating that balance into a workable access control model can be defined by three general access frameworks: Discretionary access control Mandatory access control Nondiscretionary access control
A role-based access control (RBAC) model bases the access control authorizations on the roles (or functions) that the user is assigned within an organization. The determination of what roles have access to a resource can be governed by the owner of the data, as with DACs, or applied based on policy, as with MACs.
Access control decisions are based on job function, previously defined and governed by policy, and each role (job function) will have its own access capabilities. Objects associated with a role will inherit privileges assigned to that role. This is also true for groups of users, allowing administrators to simplify access control strategies by assigning users to groups and groups to roles.
There are several approaches to RBAC. As with many system controls, there are variations on
how they can be applied within a computer system.
There are four basic RBAC architectures:
1 Non-RBAC: Non-RBAC is simply a user-granted access to data or an application by traditional
mapping, such as with ACLs. There are no formal "roles" associated with the mappings, other than
any identified by the particular user.
2 Limited RBAC: Limited RBAC is achieved when users are mapped to roles within a single
application rather than through an organization-wide role structure. Users in a limited RBAC
system are also able to access non-RBAC-based applications or data. For example, a user may
be assigned to multiple roles within several applications and, in addition, have direct access to
another application or system independent of his or her assigned role. The key attribute of limited
RBAC is that the role for that user is defined within an application and not necessarily based on
the user's organizational job function.
3 Hybrid RBAC: Hybrid RBAC introduces the use of a role that is applied to multiple applications
or systems based on a user's specific role within the organization. That role is then applied to
applications or systems that subscribe to the organization's role-based model. However, as the
term "hybrid" suggests, there are instances where the subject may also be assigned to roles
defined solely within specific applications, complimenting (or, perhaps, contradicting) the larger,
more encompassing organizational role used by other systems.
4 Full RBAC: Full RBAC systems are controlled by roles defined by the organization's policy and
access control infrastructure and then applied to applications and systems across the enterprise.
The applications, systems, and associated data apply permissions based on that enterprise
definition, and not one defined by a specific application or system.
Be careful not to try to make MAC and DAC opposites of each other -- they are two different
access control strategies with RBAC being a third strategy that was defined later to address some
of the limitations of MAC and DAC.
The other answers are not correct because:
Mandatory access control is incorrect because though it is by definition not discretionary, it is not
called "non-discretionary access control." MAC makes use of label to indicate the sensitivity of the
object and it also makes use of categories to implement the need to know.
Label-based access control is incorrect because this is not a name for a type of access control but
simply a bogus detractor.
Lattice based access control is not adequate either. A lattice is a series of levels and a subject will
be granted an upper and lower bound within the series of levels. These levels could be sensitivity
levels or they could be confidentiality levels or they could be integrity levels.
Reference(s) used for this question:
All in One, third edition, page 165
Ferraiolo, D., Kuhn, D. & Chandramouli, R. (2003). Role-Based Access Control, p. 18
Ferraiolo, D., Kuhn, D. (1992). Role-Based Access Controls. http://csrc.nist.gov/rbac/Role_Based_Access_Control-1992html
Schneiter, Andrew (2013-04-15). Official (ISC)2 Guide to the copyright CBK, Third Edition : Access Control ((ISC)2 Press) (Kindle Locations 1557-1584). Auerbach Publications. Kindle Edition.
Schneiter, Andrew (2013-04-15). Official (ISC)2 Guide to the copyright CBK, Third Edition : Access Control ((ISC)2 Press) (Kindle Locations 1474-1477). Auerbach Publications. Kindle Edition.


NEW QUESTION # 627
What is the correct sequence which enables an authorized agency to use
the Law Enforcement Access Field (LEAF) to decrypt a message sent by
using the Clipper Chip? The following designations are used for the
respective keys involved Kf, the family key; Ks, the session key; U, a
unique identifier for each Clipper Chip and Ku, the unit key that is
unique to each Clipper Chip.

  • A. Decrypt the LEAF with the family key, Kf; recover U; obtain a court
    order to obtain Ks, the session key. Use the session key to decrypt the message.
  • B. Obtain a court order to acquire the family key, Kf; recover U and Ku; then recover Ks, the session key. Use the session key to decrypt the message.
  • C. Decrypt the LEAF with the family key, Kf; recover U; obtain a court
    order to obtain the two halves of Ku; recover Ku; and then recover Ks,
    the session key. Use the session key to decrypt the message.
  • D. Obtain a court order to acquire the two halves of Ku, the unit key.
    Recover Ku. Decrypt the LEAF with Ku and then recover Ks, the
    session key. Use the session key to decrypt the message.

Answer: C

Explanation:
The explanation is based on the LEAF as shown in the Figure.

image018
The message is encrypted with the symmetric session key, Ks. In order to decrypt the message, then, Ks must be recovered. The LEAF contains the session key, but the LEAF is encrypted with the family key, Kf ,
that is common to all Clipper Chips. The authorized agency has
access to Kf and decrypts the LEAf. However, the session key is still
encrypted by the 80-bit unit key, Ku, that is unique to each Clipper
Chip and is identified by the unique identifier, U. Ku is divided into
two halves, and each half is deposited with an escrow agency. The
law enforcement agency obtains the two halves of Ku by presenting
the escrow agencies with a court order for the key identified by U.
The two halves of the key obtained by the court order are XORed
together to obtain Ku. Then, Ku is used to recover the session key, Ks, and Ks is used to decrypt the message.
The decryption sequence to obtain Ks can be summarized as:

image020
This is the sequence described in answer "Decrypt the LEAF with the family key, Kf; recover U; obtain a court order to obtain the two halves of Ku; recover Ku; and then recover
Ks,
the session key. Use the session key to decrypt the message". The sequences described in the other answers are incorrect.


NEW QUESTION # 628
Refer to the information below to answer the question.
An organization experiencing a negative financial impact is forced to reduce budgets and the number of Information Technology (IT) operations staff performing basic logical access security administration functions.
Security processes have been tightly integrated into normal IT operations and are not separate and distinct roles.
Which of the following will MOST likely allow the organization to keep risk at an acceptable level?

  • A. Removing privileged accounts from operational staff
  • B. Separating the security function into distinct roles
  • C. Increasing the amount of audits performed by third parties
  • D. Assigning privileged functions to appropriate staff

Answer: D


NEW QUESTION # 629
......

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