Poster: Key Generation Scheme Based on Physical Layer

Key generation from the randomness of wireless channels is a promising technology for the establishment of cryptographic keys between any two users. This paper introduces the wireless key generation technology based on physical layer. Aiming at the shortcomings of the existing key generation scheme, we have done optimization work in the quantization algorithm and preprocessing. We design an iterative lossless quantization algorithm, which is a multi-round lossless quantization algorithm to make full use of the collected measurements. To enhance the randomness of the generated keys, an adaptive quantization algorithm is designed, which enlarges the quantization intervals in the quantization algorithm. In addition, according to the characteristics of the measurements of static and dynamic scenario, we adopt suitable filtering methods for the respective scenario. At last we concludes with some suggestions for future studies.