IPA IP 2020 Question 66
A question IPA Japan published in 令和2年度 10月 ITパスポート試験 公開問題 問66, translated into English. ITPEC is based on the same exams.
Which of the following is the appropriate combination of words to be inserted into blanks A and B in the following description concerning the physical characteristics used in biometric authentication?
As the physical characteristics of the person in biometric authentication, those for which A is difficult and B is small are superior.
Explanation
A: forgery, B: change over time — a good biometric trait is hard to fake and stays the same for years.
Biometric authentication compares a trait read now with the template registered earlier. Two properties make a trait suitable:
- •It must be hard to forge, or an impostor could present a fake fingerprint or photo and be accepted.
- •It must change little over time, or the genuine person would be rejected more and more often as the registered template ages and would have to re-register.
Fingerprints, finger and palm veins and the iris are used because they are hard to copy and stable through adult life.
Answer (a)
Why not others:
- •(b) — individual differences must be large, not small: if everyone's trait were alike, one person could not be told from another
- •(c) — a trait that is difficult to distinguish is useless; it must be easy to tell people apart by it
- •(d) — gets both wrong: a usable trait is easy to distinguish and differs widely between people
Key rule: A biometric trait should be unique to each person (large individual differences), stable over time, and hard to forge.
Security · AI-written, may contain errors
This question comes from the past questions IPA Japan publishes, translated into English by ITPEC Practice. ITPEC Practice is an independent study tool and is not affiliated with IPA or ITPEC. See the original paper (PDF) or Report an issue.