Physical-Layer Key Generation Supported by RECAP Antenna Structures

Conference: SCC 2013 - 9th International ITG Conference on Systems, Communication and Coding
01/21/2013 - 01/24/2013 at München, Deutschland

Proceedings: SCC 2013

Pages: 6Language: englishTyp: PDF

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Filip, Alexandra; Mehmood, Rashid; Wallace, Jon; Henkel, Werner (Jacobs University Bremen, Electrical Engineering and Computer Science, Center for Advanced Systems Engineering (CASE), Bremen, Germany)

Physical-layer key generation makes use of the reciprocity of wireless time-division duplex (TDD) channels. Both transmission directions experience the same channel, apart from independent noise and quantization effects. The randomness of a mobile channel ensures a certain regeneration rate of keys. Reconfigurable antennas, so-called RECAPs, offer a possibility to also provide randomness in the extreme case when both transmitter and receiver are not moving, even have a line-ofsight connection. RECAP structures and the steps for obtaining a reliably identical and secure key on both sides are discussed.