Week 3 - Biometrics Flashcards
1
Q
What are biometrics?
A
Distinct traits that can be measured for user authentication.
2
Q
examples of physical vs. behavioral biometrics?
A
Physical - Fingerprints, facial recognition
Behavioural - Typing patterns,
3
Q
two stages of biometric authentication?
A
- Enrollment - establish a template of user biometric (fingerprint swirls)
- Operation - Identifies a person from a database
4
Q
two modes of biometric operation?
A
- Identification - find user in a database
- Verification - match user with stored template
5
Q
Define true positive, true negative, false positive, and false negative in biometrics.
A
- True positive: Correctly accepts a genuine user.
- True negative: Correctly rejects an imposter.
- False positive: Incorrectly accepts an imposter.
- False negative: Incorrectly rejects a genuine user.
6
Q
benefits of biometrics
A
eliminates the need to remember passwords
7
Q
How does facial recognition work?
A
Measures facial features (e.g., distances between eyes, nose length).
8
Q
Why is iris recognition the most reliable biometric?
A
- unique even for identical twins.
- Highly resistant to changes over time.
9
Q
limitations of fingerprint biometrics?
A
- Physical changes
- Wet conditions
10
Q
A
