Toward an operational navigation message authentication service: proposal and justification of additional OSNMA protocol features

Ignacio Fernández-Hernández , Tomer Ashur, Vincent Rijmen, Carlo Sarto , Simón Cancela , David Calle

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

5 Citations (Scopus)

Abstract

Galileo, the European GNSS, has confirmed its intention to provide Navigation Message Authentication for its Open Service already during this decade. A testing specification was made available in November 2016. Being OSNMA a novel service with several potential different users, some details of the protocol are under finalization. In particular, the paper focuses on the authentication of the public keys, renewal and revocation of all keys, and the authentication of the MAC sequence. The authentication of the public keys is proposed through a Merkle tree. The renewal and revocation of keys are handled with the existing flags, in particular NMA status, public key and chain status, and the authentication of the MAC sequence is shared between a MAC lookup table, and a new MAC that replaces previously redundant bits in the protocol. These new features complement the definition of the protocol while they do not affect OSNMA performance or appreciably increase user implementation requirements.
Original languageEnglish
Title of host publication2019 European Navigation Conference (ENC)
Place of PublicationPiscataway
PublisherInstitution of Electrical Engineers
Number of pages6
ISBN (Electronic)978-1-5386-9473-2
DOIs
Publication statusPublished - 14 May 2019
Externally publishedYes
Event2019 European Navigation Conference (ENC) - Warsaw, Poland
Duration: 9 Apr 201912 Apr 2019

Conference

Conference2019 European Navigation Conference (ENC)
CountryPoland
CityWarsaw
Period9/04/1912/04/19

Keywords

  • Galileo Open Service Navigation Message Authentication
  • OSNMA
  • spoofing

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