Unlike the mathematical encryption and decryption adopted in the classical cryptographic technology at the higher protocol layers, it is shown that characteristics intrinsic to the physical layer, such as wireless channel propagation, can be exploited to lock useful information. This information then can be automatically unlocked using real time analog RF means. In this paper retrodirective array, RDA, technology for spatial encryption in the multipath environment is for the first time combined with the directional modulation, DM, method normally associated with free space secure physical layer communications. We show that the RDA can be made to operate more securely by borrowing DM concepts and that the DM enhanced RDA arrangement is suitable for use in a multipath environment.
|Title of host publication||General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI|
|Publication status||Published - 2014|
|Event||General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI - Beijing, China|
Duration: 16 Aug 2014 → 23 Aug 2014
|Conference||General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI|
|Period||16/08/2014 → 23/08/2014|