TY - GEN
T1 - Performance analysis of a civilian GPS position authentication system
AU - Li, Zhefeng
AU - Gebre-Egziabher, Demoz
PY - 2012
Y1 - 2012
N2 - A position authentication system utilizing the white noise like GPS spreading codes as tamper proof watermarks is described. Position authentication as used in this paper means the process of checking whether position reports made by a remote user are truthful and accurate. In the method proposed, a segment of the GPS signal collected by a trusted user (called the authenticator) is used as a template. Another user's (called the supplicant) GPS signal is compared with the template to judge if the user's position and time report is authentic. An analysis to explain how noise affects the watermark signal detection is presented. The paper also discusses an important implementation issue: Multiple false peaks caused by C/A power leakage which mask the detection of the watermark. Experimental results show that the authentication method proposed can detect deceptive position report and the resolution of the position authentication is at or better than 15 meters. This method may also be used in other GNSS system, for example Galileo, by utilizing the encrypted Public Regulated Service signal as the "watermark" signal.
AB - A position authentication system utilizing the white noise like GPS spreading codes as tamper proof watermarks is described. Position authentication as used in this paper means the process of checking whether position reports made by a remote user are truthful and accurate. In the method proposed, a segment of the GPS signal collected by a trusted user (called the authenticator) is used as a template. Another user's (called the supplicant) GPS signal is compared with the template to judge if the user's position and time report is authentic. An analysis to explain how noise affects the watermark signal detection is presented. The paper also discusses an important implementation issue: Multiple false peaks caused by C/A power leakage which mask the detection of the watermark. Experimental results show that the authentication method proposed can detect deceptive position report and the resolution of the position authentication is at or better than 15 meters. This method may also be used in other GNSS system, for example Galileo, by utilizing the encrypted Public Regulated Service signal as the "watermark" signal.
KW - asset/cargo tracking
KW - position authentication
UR - http://www.scopus.com/inward/record.url?scp=84866263708&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84866263708&partnerID=8YFLogxK
U2 - 10.1109/PLANS.2012.6236845
DO - 10.1109/PLANS.2012.6236845
M3 - Conference contribution
AN - SCOPUS:84866263708
SN - 9781467303866
T3 - Record - IEEE PLANS, Position Location and Navigation Symposium
SP - 1028
EP - 1041
BT - Proceedings of the 2012 IEEE/ION Position, Location and Navigation Symposium, PLANS 2012
T2 - 2012 IEEE/ION Position, Location and Navigation Symposium, PLANS 2012
Y2 - 23 April 2012 through 26 April 2012
ER -