8: Biometric Flashcards
what is biometric
Biometrics refers to metrics related to a human characteristic
Biometric verification
Any means by which a person can be uniquely identified by evaluating one or more distinguishing biological features.
Unique identifiers of biometric
palm, hand geometry, fingerprints, retina and iris patterns, voice waves and DNA
What is false ACCEPTANCE with biometric
A rate of acceptance of unauthorized person i.e. biometric will allow a unauthorzied person to access the system.
Example of a false acceptance
Mr. A is the only authorized person to access the system. However, if biometric allows access to Mr. B, then the same is false acceptance
What is false REJECTION with biometric
A rate of rejection of authorized person(s) i.e. biometric will reject even though the person is authorized to access the system.
Example of false rejection
Mr. A is the only authorized person to access the system. However, if biometric DOES NOT allow access to Mr. A, then the same is false REJECTION
Cross Error Rate (CER) or Equal Error Rate (ERR)
It’s a rate at which FAR and FRR are equal.
Characteristic of the most effective biometric system
It will have the lowest CER or ERR
Characteristic of the most ineffective biometric system
It will have the highest CER or ERR.
What is a replay
A biometric attack in which a residual biometric characteristic such as fingerprint left on a device is used by an attacker to gain unauthorized access.
Brute force attack
Involves sending the numerous different biometric samples to a biometric device
Cryptographic attach
Targets the algorithm or the encrypted data transmitted between the biometric device and access control system.
What happens when Fale Acceptance Rate Decreases
False Rejection Rate Increases and vise- versa
most important performance indicator for biometric system
false acceptance rate (FAR
