A collection of wearable communicating devices generates signals that may be detected and analyzed to produce a fingerprint of the collection of wearable devices. An analysis unit may recognize patterns or other information in detected signals and generate a fingerprint of a body area network corresponding to the collection of wearable devices. The fingerprint may be fuzzy fingerprint, matchable with a fingerprint of a similar, but not necessarily identical, collection of wearable devices that has been previously generated or obtained. The fingerprint may be used for tracking or other purposes. Some embodiments may allow the generation of additional signals that modify the fingerprint.