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The focus of this paper are those 802.11 wireless LAN's that utilize FHSS for the 2.4 GHz ISM band. The purpose of this paper is to familiarize the reader with the mechanics of these FHSS based networks; provide background as to historical and modern usage of these networks, provide some insight as to the common architecture of these networks in the overall infrastructure of many organizations, present some of the common misconceptions regarding the inherent security of these networks, and finally to highlight some of the issues of "Security through obscurity" by positing a practical attack scenario against these networks.
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