Space-frequency grouping based key extraction for MIMO-OFDM systems

Latest developments in wireless communication networks push the limits of conventional security methods. Security can be improved with a secret key that is dynamically generated based on the surrounding physical environment. With this objective, physical layer security approaches can be implemented by means of simple signal processing methods. In this paper, we propose novel key extraction approaches based on spatial and frequency characteristics of the wireless environment. In a 2 × 2 MIMO-OFDM system, low key disagreement rates and key error rates are observed, proving the potential of physical layer key extraction techniques.

[1]  Junqing Zhang,et al.  Efficient Key Generation by Exploiting Randomness From Channel Responses of Individual OFDM Subcarriers , 2016, IEEE Transactions on Communications.

[2]  Smriti Gopinath,et al.  Reciprocity enhancement and decorrelation schemes for PHY-based key generation , 2014, 2014 IEEE Globecom Workshops (GC Wkshps).

[3]  Jinho Choi,et al.  Secret key transmission based on channel reciprocity for secure IoT , 2016, 2016 European Conference on Networks and Communications (EuCNC).

[4]  Raymond Knopp,et al.  A practical method for wireless channel reciprocity exploitation through relative calibration , 2005, Proceedings of the Eighth International Symposium on Signal Processing and Its Applications, 2005..

[5]  Junqing Zhang,et al.  Key Generation From Wireless Channels: A Review , 2016, IEEE Access.

[6]  H Vincent Poor,et al.  Wireless physical layer security , 2016, Proceedings of the National Academy of Sciences.

[7]  Yuan Ding,et al.  Experimental study on channel reciprocity in wireless key generation , 2016, 2016 IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC).

[8]  A. Ambekar,et al.  Improving channel reciprocity for effective key management systems , 2012, 2012 International Symposium on Signals, Systems, and Electronics (ISSSE).

[9]  Ning Wang,et al.  Zero reconciliation secret key extraction in MIMO backscatter wireless systems , 2016, 2016 IEEE International Conference on Communications (ICC).

[10]  Chan Chen.  Secret key establishment using wireless channels as common randomness in time-variant MIMO systems , 2010 .

[11]  Chen-Mou Cheng,et al.  Practical Physical Layer Security Schemes for MIMO-OFDM Systems Using Precoding Matrix Indices , 2013, IEEE Journal on Selected Areas in Communications.

[12]  Hsiao-Hwa Chen,et al.  Physical Layer Security for Next Generation Wireless Networks: Theories, Technologies, and Challenges , 2017, IEEE Communications Surveys & Tutorials.