Which of the following biometric parameters are better suited for authentication use over a long period of time?

A.
Iris pattern

B.
Voice pattern

C.
Signature dynamics

D.
Retina pattern

Explanation:
Of the answers given, the iris is the least likely to change over a long period of time which makes the iris pattern
better suited for authentication use over a long period of time.
The iris is the colored portion of the eye that surrounds the pupil. The iris has unique patterns, rifts, colors,
rings, coronas, and furrows. The uniqueness of each of these characteristics within the iris is captured by a
camera and compared with the information gathered during the enrollment phase. Of the biometric systems, iris
scans are the most accurate. The iris remains constant through adulthood, which reduces the type of errors
that can happen during the authentication process.
Incorrect Answers:
B: A person’s voice pattern is less suited for authentication use over a long period of time because the voice
pattern can change over time.
C: A person’s signature is less suited for authentication use over a long period of time because the signature
can change over time.
D: A person’s retina pattern is less suited for authentication use over a long period of time because the retina
pattern can change over time and can be changed by illnesses such as Diabetes.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 191