Feature-Based Multi-User Authentication for Parallel Uplink Transmissions
2016 (English)In: 2016 9TH INTERNATIONAL SYMPOSIUM ON TURBO CODES AND ITERATIVE INFORMATION PROCESSING (ISTC), IEEE, 2016, 355-359 p.Conference paper (Refereed)
We study a multi-user up-link scenario where an attacker tries to impersonate the legitimate transmitters. We present a new framework for deriving a posteriori attack probabilities from the channel observations at the access point, which enables fast intrusion detection and authentication at the physical layer and can be exploited to reduce the security overhead by offtoading higher-layer authentication schemes. This is highly relevant for delay-sensitive applications that are targeted in 5G where the security overhead may limit the real-time performance. We take a factor-graph approach that can easily be extended to take into account other features, channel models, and radio access schemes. While related works only consider single-link scenarios, the multi-user approach in this paper allows us to exploit the cross-channel correlation of the large-scale fading parameters that is due to the propagation environment for improving the detection performance. As numerical results show, especially for slowly changing channels with high correlation our approach provides significant performance gains.
Place, publisher, year, edition, pages
IEEE, 2016. 355-359 p.
International Symposium on Turbo Codes and Iterative Information Processing, ISSN 2165-4700
IdentifiersURN: urn:nbn:se:kth:diva-197023DOI: 10.1109/ISTC.2016.7593136ISI: 000386655300072ScopusID: 2-s2.0-84994415945ISBN: 978-1-5090-3401-7OAI: oai:DiVA.org:kth-197023DiVA: diva2:1054792
9th International Symposium on Turbo Codes and Iterative Information Processing (ISTC), SEP 05-09, 2016, Brest, FRANCE
QC 201612092016-12-092016-11-282016-12-09Bibliographically approved