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Free SSCP Exam Braindumps (page: 23)

Page 22 of 269
PDF with 1074 Questions

What is called the percentage of valid subjects that are falsely rejected by a Biometric Authentication system?

  1. False Rejection Rate (FRR) or Type I Error
  2. False Acceptance Rate (FAR) or Type II Error
  3. Crossover Error Rate (CER)
  4. True Rejection Rate (TRR) or Type III Error

Answer(s): A

Explanation:

The percentage of valid subjects that are falsely rejected is called the False Rejection Rate (FRR) or Type I Error.


Reference:

KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 38.



What is called the percentage at which the False Rejection Rate equals the False Acceptance Rate?

  1. False Rejection Rate (FRR) or Type I Error
  2. False Acceptance Rate (FAR) or Type II Error
  3. Crossover Error Rate (CER)
  4. Failure to enroll rate (FTE or FER)

Answer(s): C

Explanation:

The percentage at which the False Rejection Rate equals the False Acceptance Rate is called the Crossover Error Rate (CER). Another name for the CER is the Equal Error Rate (EER), any of the two terms could be used.
Equal error rate or crossover error rate (EER or CER)
It is the rate at which both accept and reject errors are equal. The EER is a quick way to compare the accuracy of devices with different ROC curves. In general, the device with the lowest EER is most accurate.
The other choices were all wrong answers:
The following are used as performance metrics for biometric systems:
false accept rate or false match rate (FAR or FMR): the probability that the system incorrectly matches the input pattern to a non-matching template in the database. It measures the percent of invalid inputs which are incorrectly accepted. This is when an impostor would be accepted by the system.
False reject rate or false non-match rate (FRR or FNMR): the probability that the system fails to detect a match between the input pattern and a matching template in the database. It measures the percent of valid inputs which are incorrectly rejected. This is when a valid company employee would be rejected by the system.
Failure to enroll rate (FTE or FER): the rate at which attempts to create a template from an input is unsuccessful. This is most commonly caused by low quality inputs.


Reference:

KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 38.
and
https://en.wikipedia.org/wiki/Biometrics



Considerations of privacy, invasiveness, and psychological and physical comfort when using the system are important elements for which of the following?

  1. Accountability of biometrics systems
  2. Acceptability of biometrics systems
  3. Availability of biometrics systems
  4. Adaptability of biometrics systems

Answer(s): B

Explanation:

Acceptability refers to considerations of privacy, invasiveness, and psychological and physical comfort when using the system.


Reference:

KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 39.



Which of the following biometric characteristics cannot be used to uniquely authenticate an individual's identity?

  1. Retina scans
  2. Iris scans
  3. Palm scans
  4. Skin scans

Answer(s): D

Explanation:

The following are typical biometric characteristics that are used to uniquely
authenticate an individual's identity:
Fingerprints
Retina scans
Iris scans
Facial scans
Palm scans
Hand geometry
Voice
Handwritten signature dynamics


Reference:

KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 39. And: HARRIS, Shon, All-In-One CISSP Certification Exam Guide, McGraw-Hill/Osborne, 2002, chapter 4: Access Control (pages 127-131).






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