2015/11/20 by Hirley Alves, Alves, Hirley, Mauricio de Castro Tomé +8
Engineering · #Wireless Communication Security Techniques #Energy Harvesting in Wireless Networks #Smart Grid Security and Resilience
paper · pdf · doi:10.48550/arxiv.1511.06518
This paper addresses the establishment of secure communication links between\nsmart-meters (Alice) and an aggregator (Bob) in the presence of an eavesdropper\n(Eve). The proposed scenario assumes: (i) MIMOME wiretap channel; (ii) transmit\nantenna selection at the Alice; (iii) no channel state information at the\ntransmitter; (iv) fixed Wyner codes; and (v) guarantee of secure throughput by\nboth quality of service and secrecy outage constraints. We propose a simple\nprotocol to enhance security via transmit antenna selection, and then assess\nits performance in closed-form by means of secrecy outage and successful\ntransmission probabilities. We assume these probabilities are our constraints\nand then maximize the secure throughput, establishing a security-reliability\ntrade-off for the proposed scenario. Our numerical results illustrate the\neffect of this trade-off on the secure throughput as well as on the number of\nantennas at Alice, Bob and Eve. Interestingly, a small sacrifice in reliability\nallows secrecy enhancement in terms of secure bps/Hz. We apply this idea in our\nsmart grid application to exemplify that, although Eve may acquire some samples\nof the average power demand of a household, it is not enough to properly\nreconstruct such curve.\n