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Fundamental Research into Geosecurity
Di Qiu, Sherman Lo, David De Lorenzo, and Per Enge
Geosecurity is the idea of using geographical and time dependent information
such as position as a factor in authentication. In essence, where you are
is an element in verifying who you are or the authorization of access. One
use is for white-listing or black-listing access based on location.
Basically, certain application or data is allowed or disallowed based on
location. For example, hospital records can be access on a given computer
when inside the hospital but not accessible in public locations. A broader
use is in geo-fencing where virtual barriers are created based on position,
navigation and time (PNT) dependent information.
Stanford University GPS Laboratory is conducting fundamental and basic research
into geosecurity. Two major related areas of work naturally arises.
First is design and use of navigation signals for geosecurity. Second is
developing public means of enhancing the security and authentication of
navigation signals.
For assessment of the first area, we have used Loran as our case study system.
Loran offers numerous location dependent features allowing for the possibility
of creating stronger authentication. Additionally, Loran is low frequency
and high power which enhances its utility and robustness. This feature
making it difficult to spoof or jam and allows for its use in some indoor
environments.
Developing security enhancement design, algorithms and systems is the logical
outcome of the use of location information for high value and security
applications. In this work, we develop and look at fundamental
techniques for authenticating the source of the signal and the position output.
Links
For a presentation on Geosecurity using Loran.
For a general presentation
on motivation and means to achieve geosecurity
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