Patent ID: 9002011
Filing Date: 2015-04-07
Classification: H04L,H04W

Abstract:
1. A method for generating a consistent cryptographic key based on wireless channel features, characterized by comprising: (1) according to a preset channel estimate method CE, both communication ends A and B respectively performing channel estimate to a current channel, obtaining channel estimated values ĥ (2) according to a preset quantization mode and quantization step, performing quantization encoding to the obtained channel estimated values ĥ (3) letting inconsistency between the channel eigenvector {tilde over (h)} wherein e represents total quantization error of channel estimate results of ends A and B, and MSE Q represents quantization mean square error that is decided by the quantization step; (4) according to the virtual channel SNR Γ, determining a proper encoding mode ENC such that its error correction performance matches expected bit error rate BER, i.e. ENC=f (5) end A coding the channel eigenvector {tilde over (h)} (6) end A and end B applying a cryptographic key generating function on {tilde over (h)}