000198559 001__ 198559
000198559 005__ 20190331102918.0
000198559 0247_ $$2doi$$a10.1155/2014/760175
000198559 022__ $$a1537-744X
000198559 02470 $$2ISI$$a000332646300001
000198559 037__ $$aARTICLE
000198559 245__ $$aSecure Wireless Communications via Cooperative Transmitting
000198559 260__ $$bHindawi Publishing Corporation$$c2014$$aNew York
000198559 269__ $$a2014
000198559 300__ $$a6
000198559 336__ $$aJournal Articles
000198559 520__ $$aInformation-theoretic secrecy is combined with cryptographic secrecy to create a secret-key exchange protocol for wireless networks. A network of transmitters, which already have cryptographically secured channels between them, cooperate to exchange a secret key with a new receiver at a random location, in the presence of passive eavesdroppers at unknown locations. Two spatial point processes, homogeneous Poisson process and independent uniformly distributed points, are used for the spatial distributions of transmitters and eavesdroppers. We analyse the impact of the number of cooperating transmitters and the number of eavesdroppers on the area fraction where secure communication is possible. Upper bounds on the probability of existence of positive secrecy between the cooperating transmitters and the receiver are derived. The closeness of the upper bounds to the real value is then estimated by means of numerical simulations. Simulations also indicate that a deterministic spatial distribution for the transmitters, for example, hexagonal and square lattices, increases the probability of existence of positive secrecy capacity compared to the random spatial distributions. For the same number of friendly nodes, cooperative transmitting provides a dramatically larger secrecy region than cooperative jamming and cooperative relaying.
000198559 700__ $$uUniv Informat Sci & Technol St Paul Apostle, Ohrid 6000, Macedonia$$aStojanovski, Toni Draganov
000198559 700__ $$0243426$$g118248$$uUniv Informat Sci & Technol St Paul Apostle, Ohrid 6000, Macedonia$$aMarina, Ninoslav
000198559 773__ $$tScientific World Journal$$q760175
000198559 909C0 $$0252435$$pISC$$xU10423
000198559 909CO $$particle$$ooai:infoscience.tind.io:198559
000198559 937__ $$aEPFL-ARTICLE-198559
000198559 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000198559 980__ $$aARTICLE