Cancelable Biometrics

[Abstract]
In biometrics authentication, re-registration and revocation are very difficult to do because human has only limited number of biometrics information. For this difficulty, cancelable biometrics has been reserched. Cancelable biometrics based on block scramble has a block boundary problem that minutiae near to block boundary are unstable. To solve this problem, we propose the scheme that uses helper data. This helper data means perturbation that will move the minutiae that is near to block boundary to far from that boundary.If we add the helper data to unstable minutiae, that minutiae will be stable and overall matching score will be improved.