Physical-layer secret key generation with untrusted relays

Chan Dai Truyen Thai, Jemin Lee, Chi Cheng, Tony Q.S. Quek

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)


In this paper, we propose a physical-layer secret key generation scheme for multi-antenna legitimate nodes with the help from multiple untrusted relays with single antenna. The relays' actions conform to the rules but they passively eavesdrop the information. Different from most previous key generation schemes, where a key is generated based on a channel coefficient, in the proposed scheme, we use the linear combination of channel coefficients to generate a key. Simulation results show that the rate leaked to the untrusted relays is low and the secret key rate is therefore high. We also point out that the relay communication can achieve higher secret key rate than the direct communication in several distance ranges.

Original languageEnglish
Title of host publication2014 IEEE Globecom Workshops, GC Wkshps 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781479974702
Publication statusPublished - 2014 Mar 18
Event2014 IEEE Globecom Workshops, GC Wkshps 2014 - Austin, United States
Duration: 2014 Dec 82014 Dec 12

Publication series

Name2014 IEEE Globecom Workshops, GC Wkshps 2014


Conference2014 IEEE Globecom Workshops, GC Wkshps 2014
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Communication


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