Method, program and service for anonymously testing location based for preference based proximity between mobile subscribers by separate transfer and evaluation of parameters

Abstract From the Canadian patent

Described is a way for computing proximity (location-based proximity or preference-based proximity) between mobile wireless subscribers (who use different services) without either divulging their location/preference to the other (preservation of privacy). Privacy is kept by providing location/preference information in steps along with an evaluation function. , The services receive partial results and then locally compute the final result, or proximity. The term proximity includes not just physical proximity but also multi-dimensional data such as preference profiles and vectors (e.g. an affinity for baseball apple pie, and ballroom dancing.).