2012 Fiscal Year Final Research Report
Position Authentication with Satellite-based Positioning
| Project/Area Number |
23651164
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Social systems engineering/Safety system
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Keywords | GPS信号 / 成りすまし / 信号の脆弱性 / 認証信号 |
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| Research Abstract |
Many of GNSS or Global Navigation Satellite Systems in addition to GPS will start services until 2020. It enhances the importance of position information for society and industries. For example, GNSS will make it possible for us to collect tolls based on routes of individual vehicles. It is a very flexible toll or taxation system that can reduce the construction cost of or traffic congestion cost cause by toll gates. On the other hands, as position information become more critical, we may be threatened by “position-cheating” by sending fake position information to escape from toll collection or taxation. We developed a method of authenticating position information from GNSS without making large modification of the existing GNSS infrastructure or a new development. The method is to send newly defined “RAND:Referance Authentication Navigation Data” via QZSS (Quasi-Zenith Satellite System) and to enable users to authenticate position data created by receiving QZSS signal including RAND. This does not affect existing GNSS or GPS services and is easy to implement. We successfully tested an experimental system processing signals created with GNSS simulators. However, we could not conduct demonstration using real satellites due to the delay and cost of modification of the QZSS ground station.
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