# Minutia-pair spectral representations for fingerprint template protection

## TL;DR

This paper presents a novel fixed-length fingerprint minutiae representation based on coordinate differences, preserving phase information, which improves matching speed while maintaining comparable accuracy to existing spectral methods.

## Contribution

Introduces a new spectral minutiae representation using coordinate differences that retains phase information and enhances computational efficiency.

## Key findings

- Matching performance is comparable to existing spectral minutiae methods.
- The new method improves matching speed.
- Phase information is preserved, enhancing accuracy.

## Abstract

We introduce a new fixed-length representation of fingerprint minutiae, for use in template protection. It is similar to the `spectral minutiae' representation of Xu et al. but is based on coordinate differences between pairs of minutiae. Our technique has the advantage that it does not discard the phase information of the spectral functions. We show that the fingerprint matching performance (Equal Error Rate) is comparable to that of the original spectral minutiae representation, while the speed is improved.