問76
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。
平成31年度 春期 ITパスポート試験 問76
This question's explanation and your answers so far.
解説
問 76
Incorrectア
Physical characteristics such as fingerprints or veins cannot be stolen merely by peeking at the screen or the hands (shoulder surfing) the way a password can. What easily leaks through peeking is knowledge information such as passwords or PINs, and this does not apply to biometric information, so it is incorrect.
Incorrectイ
Fingerprint sensors and face-recognition cameras have become increasingly compact and are in fact widely installed in mobile phones and smartphones. The statement that the device is too large to be installed contradicts the facts, so it is incorrect.
Incorrectウ
Biometric authentication always has a False Acceptance Rate (FAR), by which another person is mistakenly accepted as the legitimate user. Conversely, there is also a False Rejection Rate (FRR) that rejects the legitimate user, so the risk is never zero; this is incorrect.
- エ
正解 Biometric authentication uses not only a person's inherent physical characteristics but also behavioral characteristics. Option エ, “a person's behavioral characteristics such as handwriting or keystrokes”, refers to behavioral biometrics such as pen pressure and writing habits when signing, and the rhythm of key input (keystroke dynamics); these are also included in biometric authentication. Therefore エ is appropriate.
ここがポイント
- In addition to physical characteristics such as fingerprint, vein, face, and iris, biometric authentication also uses behavioral characteristics such as handwriting, signature, keystroke, and voiceprint.
- Biometric authentication is not perfect; it has trade-off error rates, namely the False Acceptance Rate (FAR) that accepts another person and the False Rejection Rate (FRR) that rejects the legitimate user.
用語