School of Computing

Feb 1
11:00 - 12:00
Broadcast authentication for Europe's Global Navigation Satellite System
School of Computing - Security Group Seminar
Speaker: Tomer Ashur, KU Leuven University


The Galileo project is Europe's Global Navigation Satellite System (sometimes called Europe's GPS). One of the services to be provided by Galileo once fully operational is broadcast authentication allowing clients to verify the authenticity of data they receive from the satellite constellation thus ensuring that the position data was not spoofed by an adversary en route. The nature of the problem e.g., the highly constrained communication channel, the limited processing power of receivers, and the open nature of the entire system pose a prevents the use of common authentication mechanism. As a solution, a protocol based on the TESLA Broadcast Authentication mechanism (not to be confused with the car model) was proposed an adopted by the Galileo project. This talk will discuss the problem of authenticating GNSS data, and the proposed solution.


Tomer Ashur is a post-doctoral associate in the Computer Security and Industrial Cryptography (COSIC) group in KU Leuven University. He received his PhD on the cryptanalysis of symmetric-key primitives in 2017 under the supervision of Vincent Rijmen. He was involved in the cryptanalysis of GOST2, 3DES, Morus, Simon, Speck, and in the design of the zero-knowledge optimized block cipher Jarvis, Galileo's GNSS broadcast authentication protocol, and the recent attack on the Tesla Model S key fob. He does not play the flute or any other instrument.


Cornwallis South West,
University of Kent,
United Kingdom


Open to everyone, especially those interested in cyber security research,


Contact: Jason R.C. Nurse

School of Computing, University of Kent, Canterbury, Kent, CT2 7NF

Enquiries: +44 (0)1227 824180 or contact us.

Last Updated: 14/08/2015