問63
頻出度★★★
バイオメトリクス認証はどれか。
平成21年度 春期 ITパスポート試験 問63
This question's explanation and your answers so far.
解説
問 63
- ア
正解 The correct answer is ア. Biometric authentication measures a person's physical or behavioral characteristics — such as fingerprints, irises, face, veins, or voiceprints — and uses them to judge whether the person really is who they claim to be. In terms of the three authentication factors, it is the method that uses “an attribute of the person (something you are)”. Option ア says “Authentication based on individual characteristics such as fingerprints or irises”, which is exactly the use of biological characteristics as authentication information, so it matches the very definition of biometric authentication. Biometric information cannot be separated from the person and, unlike a password, cannot be forgotten or lent to someone else, so it makes impersonation harder to carry out.
Incorrectイ
“Authentication based on an individual's knowledge” is a method that uses a password, a personal identification number (PIN), a secret question, and so on, and it corresponds to “something the person remembers (something you know)” among the three authentication factors. It only checks information the person has memorized; it does not measure any physical characteristic, so it is not biometric authentication.
Incorrectウ
“Authentication based on an individual's pattern recognition ability” tests an ability such as whether the person can read an image or some characters. It can be used to judge whether the other party is a human (a mechanism like CAPTCHA), but many people have that ability to the same degree, so it cannot uniquely identify an individual. It is also not a measurement of biological characteristics, so it does not count as biometric authentication.
Incorrectエ
“Authentication based on an individual's problem-solving ability” asks about the person's thinking ability and skills. It is not biometric information that can uniquely identify an individual the way a fingerprint or an iris can. Ability changes with learning and physical condition, and other people may reach the same answer, so it cannot serve as evidence of identity and falls outside the definition of biometric authentication.
ここがポイント
- Biometric authentication = a method that confirms a person's identity by measuring physical or behavioral characteristics such as fingerprints, irises, face, veins, or voiceprints.
- Telling the three authentication factors apart: something the person remembers (password, PIN) / something the person holds (IC card, token) / an attribute of the person (biometric information). Biometric authentication is classified under “attribute”, and combining these factors gives multi-factor authentication.
用語