問79
頻出度★★★
認証に用いられる情報 a～d のうち, バイオメトリクス認証に利用されるものだけを全て挙げたものはどれか。 a PIN (Personal Identification Number) b 虹彩 c 指紋 d 静脈
平成30年度 春期 ITパスポート試験 問79
This question's explanation and your answers so far.
解説
問 79
Incorrectア
Lists a, b, and c, but a PIN is knowledge information based on memory, not biometric authentication. Including a, which is not a physical trait, is an error. In addition, d vein — which is a physical trait — is left out, making it doubly inappropriate.
Incorrectイ
b iris and c fingerprint can indeed be used for biometric authentication, but d vein — also a physical trait — is missing. It fails to meet the condition of listing all and only the items used, and because of the omission it is incorrect.
- ウ
正解 Biometric authentication verifies a person's identity using physical or behavioral traits — information inherent to the person themselves (inherence). Among the choices, b iris, c fingerprint, and d vein are all physical traits unique to each individual and can be used for biometric authentication. In contrast, a PIN is a number the person memorizes (knowledge information), not a physical trait. Therefore, listing all and only the items usable for biometric authentication gives the 3 items b, c, and d, so the correct answer is “ウ” (b, c, d).
Incorrectエ
Lists only d vein, but b iris and c fingerprint are also representative forms of biometric authentication and equally qualify. Listing just one does not amount to listing all of them; it falls far short and is therefore incorrect.
ここがポイント
- Distinguish the three factors of authentication — knowledge information (something the person memorizes, such as a PIN or password), possession information (something the person holds, such as an IC card or token), and biometric information (a person's own physical traits, such as fingerprint, iris, vein, face, or voiceprint). A PIN is knowledge information, so it is not included in biometric authentication.
- Representative examples of biometric authentication include fingerprint, iris, vein, face, and voiceprint; they all share the common feature of using an individual's unique physical traits.
用語