Biometrics Flashcards
What are biometrics?
Biological authenticators based on physical characteristics that are used in login.
What are the issues with biometrics?
Have privacy issues as biological authenticators have to register biological metrics.
Uptake slow due to expense
Where are biometrics usually used?
Due to expenses in high-security areas such as military bases and airports.
Becoming ubiquitous in mobile phones and personal computers.
What are the ways that identity can be confirmed using biometrics?
DNA Keystroke Dynamics Gait Analysis Iris Scan Fingerprint Scans Gestures Voice recognition
What is a limitation of enrollment when using biometrics?
Systems require a large amount of data to sample when building statistical models.
What issues are there when setting an acceptance threshold?
False acceptance rate
False acceptance rate
Need to find a threshold that minimizes whatever one is more critical, while still ensuring that the other doesn’t occur.
What happens at enrollment onto a system?
Data is collected and authenticated
A template is built and sent to data storage
The built template is then checked using the data that was captured to ensure that it verifies and accepts the login.
Correction and remove of data can happen where required.
What happens on login into a system that uses biometrics?
Data is extracted and then the system attempts to find the user it identifies.
What are fingerprint classification built using?
Whorls, loops and arches on the finger.
These can degrade over time.
How does face recognition identify a user?
Uses overall facial structure, the distance between outer and inner eye pairs as well as nose and mouth points.
Why are people generally more open to face recognition than other forms of biometric?
People are used to photos of their face being used for ID and taken on a daily basis already.
What identifiers are used when using iris scanning?
Rings of the iris
Furrows of the eyes
Corona of the tissue that it radially divides the iris.
What are soft biometrics?
Biometrics that change with time, such as height, weight, gait and hair color.
These are used to prune the search of individuals
What are the advantages of using a knowledge-based password
Low Cost Easy to use Easy to implement No special devices needed Familiar to users
What are the disadvantages of using a knowledge-based password?
Less secret with every use Can be easily guessed Multiple attack scenarios Users tend to choose weak passwords Multiple passwords required Doesn't identify the user uniquely.
