Assessing the Spoofing Threat
- From: Sam Wormley <swormley1@xxxxxxxxx>
- Date: Tue, 13 Jan 2009 00:06:48 GMT
Assessing the Spoofing Threat
http://mg.gpsworld.com/gpsmg/content/printContentPopup.jsp?id=574717
Jan 1, 2009
By: Todd E. Humphreys, Mark L. Psiaki, Paul M. Kintner, Jr.
GPS World
Seven years after the Volpe Report warned that "[a]s GPS further penetrates into the civil infrastructure, it becomes a tempting target that could be exploited by individuals, groups, or countries hostile to the U.S.," civil GPS receivers remain as vulnerable as ever to this threat. Among other types of interference, the Volpe report considers civil GPS spoofing, a pernicious type of intentional interference whereby a GPS receiver is fooled into tracking counterfeit GPS signals. More sinister than intentional jamming, spoofing deceives the targeted receiver, which cannot detect a spoofing attack and so cannot warn users that its navigation solution is untrustworthy. The Volpe report noted the absence of any off-the-shelf defense against civilian spoofing and lamented that "[t]here also is no open information on . . . the expected capabilities of spoofing systems made from commercial components." It recommended studies to characterize the spoofing threat: "Information on the capabilities, limitations, and operational procedures [of spoofers] would help identify vulnerable areas and detection strategies."
We recently canvassed four manufacturers of high-quality GPS receivers. They revealed that they were aware of the spoofing vulnerability but had not taken steps to equip their receivers with even rudimentary spoofing countermeasures. The manufacturers expressed skepticism about the seriousness of the threat and noted that countermeasures, if required, had better not be too expensive. Such attitudes propel further examination of the threat and practical countermeasures.
For the rest of the Story See:
http://mg.gpsworld.com/gpsmg/content/printContentPopup.jsp?id=574717
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