Key generation from wireless channels: a survey and practical implementation

Key generation from wireless channels: a survey and practical implementation

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This chapter reviewed the key generation from wireless channels and presented a case study by implementing an RSS-based key generation system. We introduced the key generation principles, evaluation metrics, procedure, and channel parameters. We then implemented a key generation system by using WARP hardware, which is a customized FPGA-based platform. We carried out several experiments in the indoor environment and tested the key generation principles, i.e. temporal variation, channel reciprocity, and spatial de-correlation. We concluded that key generation is workable in dynamic environment but cannot operate properly in static channels.

Chapter Contents:

  • 18.1 Introduction
  • 18.2 A survey of wireless key generation
  • 18.2.1 Principles
  • 18.2.2 Evaluation metrics
  • Randomness
  • Key generation rate
  • Key disagreement rate
  • 18.2.3 Key generation procedure
  • Channel probing
  • Quantization
  • Information reconciliation
  • Privacy amplification
  • 18.2.4 Channel parameters
  • 18.3 Case study: practical implementation of an RSS-based key generation system
  • 18.3.1 Preliminary
  • IEEE 802.11 protocol
  • WARP hardware
  • 18.3.2 Measurement system and test scenario
  • 18.3.3 Experiment results
  • Temporal variation
  • Channel reciprocity
  • Spatial de-correlation
  • 18.4 Conclusion
  • References

Inspec keywords: wireless channels; public key cryptography; field programmable gate arrays; telecommunication security; 5G mobile communication

Other keywords: spatial decorrelation; channel reciprocity; public key cryptography; evaluation metrics; channel parameters; customized FPGA-based platform; WARP hardware; key generation principles; indoor environment; RSS-based key generation system; temporal variation; static channels; wireless channels

Subjects: Mobile radio systems; Logic circuits; Cryptography

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