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http://hdl.handle.net/10609/97248
Title: Técnicas de autenticación criptográfica en señales abiertas GNSS: el fenómeno del spoofing y métodos de defensa
Author: Iglesias Fernández, José Luis
Director: Cobo Rodríguez, Germán  
Tutor: Seco Granados, Gonzalo
Keywords: authentication
OSNMA
spoofing
Issue Date: Jun-2019
Publisher: Universitat Oberta de Catalunya (UOC)
Abstract: GNSS are a very important source of information in terms of location and timing techonologies. Everyday new systems and devices get connected via these systems. Of course, as the number of devices connected via GNSS grows, so does the security concerns related to the emerging threats. The most important threat in short and mid term are spoofing attacks. These aim to deceive the receiver with a fake signal that pretends to be authentic, so the user gets located with an unreal position. Security information is one of the basis of IT systems and the number and complexity of attacks to GNSS keep growing. Different kinds of spoofing attacks are discussed on this paper. Related to this, defense methods to face this sort of attacks are also displayed. Advanced methods of defence are cryptography based and involve the entire system. On this paper different authentication methods used in GNSS are discussed, focusing on those designed for open civil signals and plaintext communications. Galileo uses ONSMA to encrypt and authenticate navegation messages used in Open-Service applications. GPS proposal scheme Chimera involves timebinding and spreading code encryption. QZSS aims to authenticate GPS signals by using L1SAIF signal. A proof-of-concept has been designed and developed to analyze OSNMA authentication method, based on TESLA algorithm and used in Galileo system. A benchmark is displayed to discuss Galileo OSNMA and GPS Chimera main features, disadvantages and requirements. In the last chapters of this paper, conclusions and future work can be found.
Language: Spanish
URI: http://hdl.handle.net/10609/97248
Appears in Collections:Bachelor thesis, research projects, etc.

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