GPS ephemeris spoofing

Caglar, Deniz

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https://hdl.handle.net/2142/129980 Copy

Description

Title

GPS ephemeris spoofing

Author(s)

Caglar, Deniz

Issue Date

2025-07-23

Director of Research (if dissertation) or Advisor (if thesis)

Levchenko, Kirill Igorevich

Department of Study

Electrical & Computer Eng

Discipline

Electrical & Computer Engr

Degree Granting Institution

University of Illinois Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• GPS
• navigation
• ephemeris
• spoof

Abstract

GPS is a critical source of positioning and timing information for critical systems in a high number of civilian and military sectors. Although classic spoofing techniques have been thoroughly discussed and certain countermeasures enacted for certain use cases, there still is not a robust solution. We demonstrate that it is possible to trick a modern GPS receiver with a new spoofing technique: ephemeris spoofing. We demonstrate that an attacker can trick a receiver to alculate a false position, given control of the navigation data fed into the receiver, without actually emitting a GPS signal. We then analyze the capabilities of such an attacker and show that arbitrary longitude changes and receiver bias changes are possible. We consider potential data channels that can be used for this attack and conclude with a discussion on potential mitigations.

Graduation Semester

2025-08

Type of Resource

Thesis

Handle URL

https://hdl.handle.net/2142/129980

Copyright and License Information

Copyright 2025 Deniz Caglar

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