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Secret key generation scheme from WiFi and LTE reference signals

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Abstract

Physical layer security has emerged as a promising approach to strengthen security of wireless communications. Particularly, extracting secret keys from channel randomness has attracted an increasing interest from both academic and industrial research groups. In this paper, we present a complete implantation of a secret key generation (SKG) protocol which is compliant with existing widespread Radio Access Technologies. This protocol performs the quantization of the channel state information, then information reconciliation and privacy amplification. We also propose an innovative algorithm to reduce the correlation between quantized channel coefficients that significantly improves the reliability and the resilience of the complete SKG scheme. Finally we assess the performance of our protocol by evaluating the quality of secret keys generated in various propagation environments from real single sense LTE signals, and real single and dual sense WiFi signals.

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Authors and Affiliations

  1. Thales Communications and Security (TCS), Gennevilliers, France

    Christiane L. Kameni Ngassa, Renaud Molière & François Delaveau

  2. Telecom ParisTech (TPT), Paris, France

    Alain Sibille

  3. Celeno Communications, Ra’anana, Israel

    Nir Shapira

Authors
  1. Christiane L. Kameni Ngassa
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  2. Renaud Molière
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  3. François Delaveau
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  4. Alain Sibille
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  5. Nir Shapira
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Corresponding author

Correspondence to Christiane L. Kameni Ngassa.

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Kameni Ngassa, C.L., Molière, R., Delaveau, F. et al. Secret key generation scheme from WiFi and LTE reference signals. Analog Integr Circ Sig Process 91, 277–292 (2017). https://doi.org/10.1007/s10470-017-0941-3

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  • DOI: https://doi.org/10.1007/s10470-017-0941-3

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