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Physical layer security is an emerging security area that explores possibilities of achieving perfect secrecy data transmission between the intended network nodes, while possible malicious nodes that eaves drop the communication obtain zero information. The so-called secrecy capacity can be improved using friendly jammers that introduce extra interference to the eavesdroppers. Here, it investigated the interaction between the source that transmits the useful data and friendly jammers who assist the source by "masking" the eavesdropper. In order to obtain distributed solution, one possibility is to introduce a game theoretic approach. The game is defined such that the source pays the jammers to interfere the eavesdropper, therefore, increasing the secrecy capacity.
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