Biometric and Physical Identifiers with Correlated Noise for Controllable Private Authentication

Research output: Contribution to book/Conference proceedings/Anthology/ReportConference contributionContributedpeer-review

Contributors

  • Onur Gunlu - , Technical University of Berlin (Author)
  • Rafael F. Schaefer - , Technical University of Berlin (Author)
  • H. Vincent Poor - , Princeton University (Author)

Abstract

The problem of secret-key based authentication under privacy and storage constraints on the source sequence is considered. The identifier measurement channels during authentication are assumed to be controllable via a cost-constrained action sequence. Single-letter inner and outer bounds for the keyleakage-storage-cost regions are derived for a generalization of a classic two-terminal key agreement model with an eavesdropper that observes a sequence that is correlated with the sequences observed by the legitimate terminals. The additions to the model are that the encoder observes a noisy version of a remote source, and the noisy output and the remote source output together with an action sequence are given as inputs to the measurement channel at the decoder. Thus, correlation is introduced between the noise components on the encoder and decoder measurements. The model with a secret key generated by an encoder is extended to the randomized models, where a secret-key is embedded to the encoder. The results are relevant for several user and device authentication scenarios including physical and biometric identifiers with multiple measurements that provide diversity and multiplexing gains. To illustrate the behavior of the rate region, achievable (secret-key rate, storage-rate, cost) tuples are given for binary identifiers and measurement channels that can be represented as a mixture of binary symmetric subchannels. The gains from using an action sequence such as a large secret-key rate at a significantly small hardware cost, are illustrated to motivate the use of low-complexity transform-coding algorithms with cost-constrained actions.

Details

Original languageEnglish
Title of host publication2020 IEEE International Symposium on Information Theory, ISIT 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages874-878
Number of pages5
ISBN (electronic)978-1-7281-6432-8
Publication statusPublished - Jun 2020
Peer-reviewedYes
Externally publishedYes

Publication series

SeriesIEEE International Symposium on Information Theory
Volume2020-June
ISSN2157-8095

Conference

Title2020 IEEE International Symposium on Information Theory, ISIT 2020
Duration21 - 26 July 2020
CityLos Angeles
CountryUnited States of America

External IDs

ORCID /0000-0002-1702-9075/work/165878302