Secret Key Sharing and Rateless Coding for Practical Secure Wireless Transmission

We discuss a secure wireless communication scheme, focusing on designing two major components: the key generation and the coding scheme. To achieve high key matching rate, we propose a feed-forward and feed-back quantization. The proposed scheme offers 1 dB improvement over the best known schemes. We also propose a universal quantization scheme with feedforward/feed-back and show that its performance is the same as, or better than the other schemes which require prior distribution information. For rate-adaptive coding, we propose the use of rateless codes. Our evaluations show that the rateless code can offer significant performance gain over a low-density parity-check (LDPC) code. Moreover, we implement a soft input rateless decoder which offers additional gains. The overall security performance of our design based on these two components significantly outperforms existing designs. International Conference on Dependability (DEPEND) This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved. Copyright c ©Mitsubishi Electric Research Laboratories, Inc., 2011 201 Broadway, Cambridge, Massachusetts 02139