How to prove where you are
Eran Gabber, Avishai Wool · 1998
Monitoring the location of customer equipment is an important problem in the direct broadcasting sateMte indw try.This is because the service providers wotdd We to pr~ vent unauthorized movement of a customer's set top terminal (STT) from a home to a pubtic venue, or acro~an international border, due to tious kancid, copyright and po~ticd issues.h this paper we study four schemw for detecting the movement of the an STT using the ~ting (or emerging) communication tiastructttre.We start with the currently used scheme which is based on the telephone network's ~ or Cm (cdlw-~) featurw, and show how it can be undermined.Then we suggest three new schem= which are more robust than the cder ~scheme one that that uses the Globrd Positioning System (GPS), one that uses the cefldar phone's enhanced 911 (E911) service, and one that mea-sur~the tim~Werenceof-arriti of the sat eMte's broadcast.We ~the accuracy, featur~and vtdnerabtities of ed scheme.We *O present possible attacks that Mow pirates to coned their movement when these schemw are employed._-.