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Abstract

Technologies are generally described for using metrics of radio path characteristics within a wireless network to establish signal signature vectors. These signal signature vectors may be used as a shared secret between network nodes to establish affirmative identification. For example, a signal signature vector may be established when a new node sends a fixed number of packets to the existing nodes and the existing nodes send a fixed number of other packets back to the new node. The number of properly received packets can be counted to establish a success probability between the new node and each existing node. These probabilities can be normalized and quantized to generate signal signature vectors at each node. Without every transmitting any of the vectors, the vector at the new node should be highly correlated to the vectors at existing nodes since the pair-wise channels between each of the nodes should be reasonably symmetrical.

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First Claim