Invention Grant
US09002011B2 Method for generating consistent cryptographic key based on wireless channel features 有权
基于无线信道特征生成一致加密密钥的方法

Method for generating consistent cryptographic key based on wireless channel features
Abstract:
The present invention discloses a method for generating a consistent cryptographic key based on wireless channel features. First of all, channel estimated values ĥa, ĥb and channel estimate mean square error MSE are obtained through channel estimate, and then quantized channel eigenvectors {tilde over (h)}a and {tilde over (h)}b are obtained through quantization coding; next, inconsistency between {tilde over (h)}b and {tilde over (h)}a is equivalent to obtaining {tilde over (h)}b at end B through virtual channel noise adding the channel eigenvector {tilde over (h)}a sent by end A, and Signal-to-Noise ratio SNR Γ of the virtual channel is determined; a proper coding mode ENC is determined according to the virtual channel SNR Γ; both communication parties perform corresponding coding and decoding according to ENC and thereby obtain an estimated value {tilde over (ĥ)}a of {tilde over (h)}a; finally, a cryptographic key generating function is applied to {tilde over (h)}a and {tilde over (ĥ)}a, whereby a cryptographic key Kc is obtained. The present invention increases the validity of consistent dynamic cryptographic key generating and achieves information security and privacy at the physical layer.
Information query
Patent Agency Ranking
0/0