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Privacy Preserving Location Based Services Disclosure Number: IPCOM000015866D
Original Publication Date: 2002-Oct-06
Included in the Prior Art Database: 2003-Jun-21

Publishing Venue



This invention delivers location based service without sharing location information. Assume there are a large number of people with location aware wireless devices (e.g. GPS enabled cell phones). A single criminal individual at an establishment receiving personally identifiable information (PII data) along with current location could misuse that information and cause significant harm. Preserving privacy requires a protocol involving several steps: 1) A spatio-temporal index must be creating associated “arrival times” with points in space. This is a multidimensional index in that arrival time(s) is(are) defined with respect to target location(s).