Authors:
Wojciech Wodo
;
Lucjan Hanzlik
and
Kamil Kluczniak
Affiliation:
Wroclaw Univeristy of Technology, Poland
Keyword(s):
Biometric Template, Cancelable Biometrics, Intersection Cardinality, Private Sets, Security, Impersonation, Whitelist, Anonimity, Bloom Filter.
Related
Ontology
Subjects/Areas/Topics:
Biometrics Security and Privacy
;
Data and Application Security and Privacy
;
Data Protection
;
Identification, Authentication and Non-Repudiation
;
Information and Systems Security
;
Privacy
Abstract:
In this paper we investigate the concept of cancelable biometrics and propose a new scheme for user authorisation providing anonymity based on privacy-preserving computations on sets. We define a problem called (t;n) -Threshold Subset Problem and apply it to a biometric-based security system. Our solution implements biometric template protection based on one-way transformations and Bloom filters. Users authentication data is stored in form of a whitelist and the authorisation process is based on a zero-knowledge proof approach. Using oblivious polynomial evaluation (OPE) a legitimate user is able to recreate a secret polynomial and answer the challenge send by a verifier. We assume that biometric data can be acquired and digitized to the form of a vector representation.