You have been asked to help with a authentication problem th

You have been asked to help with a authentication problem that was reported after moving to biometric authentication. One of you company’s employees enrolled with a fingerprint reader and was able to authenticate for several weeks using the new system. Then, one day, the employee complained that after cutting his finger he could no longer authenticate and received a “Type 1” error. What is most likely the problem?

A. The system does not examine enough information to determine the user.

B. Fingerprint readers are not very good at handling type 1 errors by nature since these are very dynamic in nature.

C. Fingerprint readers are not very good at handling type 1 errors by nature since they have high cross-over error rates.

D. The system examines too much information and needs to be configured to be less sensitive.

Solution

D. A biometric system cannot examine all the detail in an object or they are prone to false rejection type I errors. Answer A, B, and C are incorrect as Type I errors occur when legitimate users are improperly denied access. If they however do not examine enough information about an object they are prone to false accepts type II errors. Type II errors occur when unauthorized individuals are granted access to resources and devices they should not have. Fingerprints are fairly static metrics and some systems are very accurate. Exam candidates should know the difference between Type I and Type II errors and how CER is used.