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Recently, several research contributions have justified that wireless communication is not only a security burden. Its unpredictable and erratic nature can also be turned against an adversary and used to augment conventional security protocols, especially key agreement. In this paper, the authors are inspired by promising studies on such key agreement schemes, yet aim for releasing some of their limiting assumptions. They demonstrate the feasibility of their scheme within performance-limited wireless sensor networks. The central idea is to use the reciprocity of the wireless channel response between two transceivers as a correlated random variable.
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