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This letter utilizes the principle of reciprocity in electromagnetic wave propagation as well as the variations of the wireless channel state to share secrets in wireless networks. In particular, a novel secret sharing mechanism is proposed to share secret bits between two wireless users. Using the Central Limit Theorem, we show that the proposed approach can provide performance guarantee when only...
This paper presents the lowest bitrate mode (64 kbit/s) of the new superwideband (SWB, 50–14000 Hz) coder, recently standardized as ITU-T G.722 Annex B. This mode provides a superwideband extension of G.722 at 56 kbit/s with one 8 kbit/s enhancement layer divided in two sub-layers. The resulting bitstream is compatible with ITU-T G.722 at 64 kbit/s and can be viewed as watermarking G.722 least significant...
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