Evaluation of the Effect of Global Positioning System (GPS) Simplistic Spoofing Attacks on GPS Perfo...
Download
1 / 28

Introduction - PowerPoint PPT Presentation


  • 142 Views
  • Uploaded on

Evaluation of the Effect of Global Positioning System (GPS) Simplistic Spoofing Attacks on GPS Performance. Introduction. Increasing use for PNT applications: Positioning Navigation Timing . GNSS Vulnerabilities. Ionospheric delay Tropospheric delay Satellite clock error Ephemeris error

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Introduction' - kaili


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Evaluation of the Effect of Global Positioning System (GPS) Simplistic Spoofing Attacks on GPS Performance


Introduction
Introduction Simplistic Spoofing Attacks on GPS Performance

Increasing use for PNT applications:

  • Positioning

  • Navigation

  • Timing


Gnss vulnerabilities
GNSS Vulnerabilities Simplistic Spoofing Attacks on GPS Performance

  • Ionospheric delay

  • Tropospheric delay

  • Satellite clock error

  • Ephemeris error

  • Signal error

  • LOS blockage

  • Receiver noise

  • Dilution of precision

  • Jamming

  • Spoofing


Gnss spoofing

Forging and transmission of navigation messages in order to manipulate the navigation solutions of GNSS receivers

Even if a spoofer is not fully successful, he/she can still create significant errors and jam GNSS signals over large areas

GNSS Spoofing






Gnss spoofing5

A number of GNSS simulators have been designed for legal purposes

In the wrong hands, can be used for spoofing

GNSS Spoofing



Gnss spoofing7

The spoofing threat continuum equipment

GNSS Spoofing


Gnss spoofing8

Meaconing equipment

GNSS Spoofing

  • GNSS record and playback systems record real GNSS signals and retransmit the signals to evaluated GNSS receivers.

  • While spoofing using this method cannot be used to impose user-defined scenarios on a receiver, it can still cause the receiver to compute false location fixes using the transmitted real GNSS signals.

  • Furthermore, this form of attack can be used for spoofing military GNSS signals


Gnss spoofing9
GNSS Spoofing equipment


Gnss spoofing10
GNSS Spoofing equipment


Objectives
Objectives equipment

  • This study is aimed at evaluating GPS performance during simplistic GPS spoofing attacks.

  • Spoofing is conducted using a standalone GPS simulator, which at present poses the greatest near-term threat.

  • In this type of spoofing attack, the spoofing signal is not synchronised (in terms of power level, phase, Doppler shift and data content) with the genuine signals received by the target GPS receiver.

  • This could cause the target GPS receiver to temporarily lose position fix lock first, before being taken over by the spoofing signal.


Methodology
Methodology equipment

Test Setup

Test area located at

N 2º 58.056’ E 101º 48.586’ 70m


Methodology1
Methodology equipment

Test Scenario

  • Test area located at N 2º 58.056’ E 101º 48.586’ 70m

  • The spoofing signal is set for position of N 2º 58’ E 101º 48’ 80m, while the time is set at the simulator’s GPS receiver’s time.


Results discussion
Results & Discussion equipment

The effect of GPS spoofing attacks

Evaluated GPS receiver

Reference GPS receiver


Results discussion1
Results & Discussion equipment

The effect of spoofing on GPS accuracy

Evaluated GPS receiver

Reading 2

Reading 3

Reading 1

Reading 5

Reading 6

Reading 4


Results discussion2
Results & Discussion equipment

The effect of spoofing on GPS accuracy

Reference GPS receiver

Reading 2

Reading 3

Reading 1

Reading 5

Reading 6

Reading 4


Gps spoofing
GPS equipmentSpoofing

The effect of spoofing on GPS accuracy

Evaluated GPS receiver

Reference GPS receiver


Conclusion
Conclusion equipment

  • Varying minimum spoofing signal power levels, times between position fix lost and spoofing, and probable error patterns are observed for different dates and times.

    • This is due to the GPS satellite constellation being dynamic, causing varying GPS satellite geometry over time, resulting in GPS performance being time dependent.

    • Variation in other GNSS error parameters, including ionospheric and tropospheric delays, satellite clock, ephemeris and multipath errors, and unintentional signal interferences and obstructions, could have also resulted in the variation of GPS performance.

  • As the spoofing signal power level is increased, probable error values increase due to decreasing C/N0levels for GPS satellites tracked by the receiver.

    • For all the readings, the highest probable errors occur at the minimum spoofing power levels. After spoofing takes place, the probable errors reduce to levels that are lower as compared to prior to transmission of the spoofing signal.

    • This occurs as at this point, the spoofing signal power level is relatively large, resulting in high C/N0 level and hence, improved accuracy.


Scope for future work
Scope for equipmentFuture Work

  • On the whole, this study has demonstrated the disadvantages of field GNSS evaluations.

  • Without the ability to control the various GNSS error parameters, it is difficult to effectively study the effect of any particular error parameter, in the case of this study, spoofing, on GNSS accuracy.

  • This highlights the importance of conducting such tests in a controlled environment, using a GNSS simulator as the source of genuine GNSS signals as opposed to live GNSS signals.

  • This would allow the tests to be conducted under repeatable user-controlled conditions.


Gnss receiver evaluation
GNSS Receiver Evaluation equipment

GNSS Simulation

Field Evaluation

  • Employs live GNSS signals.

  • Should be conducted in open area with clear view of the sky.

  • Tests scenarios are uncontrollable by users and not repeatable.

  • Employs simulated GNSS signals.

  • Should be conducted in a RF enclosure (e.g. anechoic chamber).

  • Test scenarios are user controllable and repeatable.


Gps jamming
GPS Jamming equipment

Field Evaluation

GPS Simulation


Gps functional tests
GPS Functional Tests equipment

Pendulum Instruments GPS-12R

Trimble Geoexplorer 6000 GeoXH, Nomad 900G and Juno SB

Magellan Z-Max

Topcon Hiper GA

Trimble R8

ProMark 200


Research collaborations
Research Collaborations equipment

  • Effect of Radio Frequency Interference (RFI) on Global Positioning System (GPS) Static Observations

    • Collaboration with Faculty of Architecture, Planning and Surveying (FSPU), Universiti Teknologi MARA (UiTM)

    • Project Co-Leaders:

      • Assoc. Prof. Sr. Dr. Azman Mohd Suldi

      • Mr. Ahmad Norhisyam Idris


THANK YOU equipment


ad