問75
頻出度★★★
バイオメトリクス認証に関する記述として, 適切なものはどれか。
令和4年度 ITパスポート試験 問75
This question's explanation and your answers so far.
解説
問 75
Incorrectア
Biometric information such as fingerprints and veins originates from the person's own body, and unlike a password, it cannot be copied or leaked by peeking at the screen or the hands (shoulder hacking). On the contrary, resistance to peeking is an advantage of biometric authentication, so the statement is the opposite of the truth.
Incorrectイ
Fingerprint sensors and face-recognition cameras have been made sufficiently compact and are in fact widely installed in mobile phones and smartphones. The claim that “the device is too large to be installed” is contrary to fact.
- ウ
正解 Biometric authentication uses not only physical characteristics such as fingerprints, veins, and irises, but also behavioral characteristics such as handwriting (the way a signature is written) and keystrokes (the rhythm and speed of typing). Therefore, choice “ウ”, which states that “it also includes those that use a person's behavioral characteristics, such as handwriting or keystrokes,” is correct.
Incorrectエ
In biometric authentication, there is always a rate at which another person is mistakenly accepted as the legitimate user — the False Acceptance Rate (FAR) — so the risk cannot be reduced to zero (conversely, there is also the False Rejection Rate, FRR, which rejects the legitimate user). Thus “there is no risk” is incorrect.
ここがポイント
- Biometric authentication covers not only physical characteristics (fingerprints, veins, irises, and faces) but also behavioral characteristics such as handwriting and keystrokes.
- Biometric authentication has error rates that trade off against each other — the False Acceptance Rate (FAR) and the False Rejection Rate (FRR) — so its accuracy is not perfect.
用語