Fair Comparison and Evaluation of Quantization Schemes for PHY-based Key Generation

René Guillaume, Andreas Mueller , Christian Zenger, Chris­tof Paar, Andreas Czylwik

18th International OFDM Workshop 2014, Essen, Germany


The generation of symmetric cryptographic keys out of wireless channel properties represents a promis- ing approach for the establishment of secured communi cation links. Despite the tremendous number of different channel-based key generation protocols, there is little re search on security evaluation and fair comparison of those systems. We present suitable metrics and a source model for a security evaluation of quantization schemes for physical layer security systems. By analyzing recent key generation techniques, we evaluate performances and security trade offs.