Abstract
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.
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