Free SSCP Exam Braindumps (page: 94)

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Which of the following is NOT a common integrity goal?

  1. Prevent unauthorized users from making modifications.
  2. Maintain internal and external consistency.
  3. Prevent authorized users from making improper modifications.
  4. Prevent paths that could lead to inappropriate disclosure.

Answer(s): D

Explanation:

Inappropriate disclosure is a confidentiality, not an integrity goal. All of the other choices above are integrity goals addressed by the Clark-Wilson integrity model.
The Clark-Wilson model is an integrity model that addresses all three integrity goals:
1. prevent unauthorized users from making modifications,
2. prevent authorized users from making improper modifications, and
3. maintain internal and external consistency through auditing.
NOTE: Biba address only the first goal of integrity above


Reference:

Harris, Shon (2012-10-18). CISSP All-in-One Exam Guide, 6th Edition (p. 1384). McGraw-Hill.
Kindle Edition.



When it comes to magnetic media sanitization, what difference can be made between clearing and purging information?

  1. Clearing completely erases the media whereas purging only removes file headers, allowing the recovery of files.
  2. Clearing renders information unrecoverable by a keyboard attack and purging renders information unrecoverable against laboratory attack.
  3. They both involve rewriting the media.
  4. Clearing renders information unrecoverable against a laboratory attack and purging renders information unrecoverable to a keyboard attack.

Answer(s): B

Explanation:

The removal of information from a storage medium is called sanitization. Different kinds of sanitization provide different levels of protection. A distinction can be made between clearing information (rendering it unrecoverable by a keyboard attack) and purging (rendering it unrecoverable against laboratory attack).
There are three general methods of purging media: overwriting, degaussing, and destruction.
There should be continuous assurance that sensitive information is protected and not allowed to be placed in a circumstance wherein a possible compromise can occur. There are two primary levels of threat that the protector of information must guard against: keyboard attack (information scavenging through system software capabilities) and laboratory attack (information scavenging through laboratory means). Procedures should be implemented to address these threats before the Automated Information System (AIS) is procured, and the procedures should be continued throughout the life cycle of the AIS.
Reference(s) use for this question:
SWANSON, Marianne & GUTTMAN, Barbara, National Institute of Standards and Technology (NIST), NIST Special Publication 800-14, Generally Accepted Principles and Practices for Securing Information Technology Systems, September 1996 (page 26).
and
A guide to understanding Data Remanence in Automated Information Systems



What is the main issue with media reuse?

  1. Degaussing
  2. Data remanence
  3. Media destruction
  4. Purging

Answer(s): B

Explanation:

The main issue with media reuse is data remanence, where residual information still resides on a media that has been erased. Degaussing, purging and destruction are ways to handle media that contains data that is no longer needed or used.


Reference:

WALLHOFF, John, CBK#10 Physical Security (CISSP Study Guide), April 2002 (page 5).



Which of the following should NOT be performed by an operator?

  1. Implementing the initial program load
  2. Monitoring execution of the system
  3. Data entry
  4. Controlling job flow

Answer(s): C

Explanation:

Under the principle of separation of duties, an operator should not be performing data entry. This should be left to data entry personnel.
System operators represent a class of users typically found in data center environments where mainframe systems are used. They provide day-to-day operations of the mainframe environment, ensuring that scheduled jobs are running effectively and troubleshooting problems that may arise. They also act as the arms and legs of the mainframe environment, load and unloading tape and results of job print runs. Operators have elevated privileges, but less than those of system administrators. If misused, these privileges may be used to circumvent the system's security policy. As such, use of these privileges should be monitored through audit logs.
Some of the privileges and responsibilities assigned to operators include:
Implementing the initial program load: This is used to start the operating system. The boot process or initial program load of a system is a critical time for ensuring system security. Interruptions to this process may reduce the integrity of the system or cause the system to crash, precluding its availability.
Monitoring execution of the system: Operators respond to various events, to include errors, interruptions, and job completion messages.
Volume mounting: This allows the desired application access to the system and its data.
Controlling job flow: Operators can initiate, pause, or terminate programs. This may allow an operator to affect the scheduling of jobs. Controlling job flow involves the manipulation of configuration information needed by the system. Operators with the ability to control a job or application can cause output to be altered or diverted, which can threaten the confidentiality.
Bypass label processing: This allows the operator to bypass security label information to run foreign tapes (foreign tapes are those from a different data center that would not be using the same label format that the system could run). This privilege should be strictly controlled to prevent unauthorized access.
Renaming and relabeling resources: This is sometimes necessary in the mainframe environment to allow programs to properly execute. Use of this privilege should be monitored, as it can allow the unauthorized viewing of sensitive information.
Reassignment of ports and lines: Operators are allowed to reassign ports or lines. If misused, reassignment can cause program errors, such as sending sensitive output to an unsecured location. Furthermore, an incidental port may be opened, subjecting the system to an attack through the creation of a new entry point into the system.


Reference:

Hernandez CISSP, Steven (2012-12-21). Official (ISC)2 Guide to the CISSP CBK, Third Edition ((ISC)2 Press) (Kindle Locations 19367-19395). Auerbach Publications. Kindle Edition.



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