# Galileo's Proposed Authentication Algorithm: Part 1

DevFeed: [Galileo's Proposed Authentication Algorithm: Part 1](<https://devfeed.tech/articles/galileo-s-proposed-authentication-algorithm-part-1-36405.md>)

Original publisher: [Read original article](<https://berthub.eu/articles/posts/galileos-authentication-algorithm-part-1/>)

Published: 2020-08-13T18:50:09Z

Content type: article

Language: en

Sources: [Bert Hubert's writings](<https://devfeed.tech/sources/bert-hubert-s-writings.md>)

Topics: [Cryptography](<https://devfeed.tech/topics/cryptography.md>), [Security, Privacy and Abuse Prevention](<https://devfeed.tech/topics/security-privacy-and-abuse-prevention.md>), [integrity](<https://devfeed.tech/topics/integrity.md>), [Provable security](<https://devfeed.tech/topics/provable-security.md>), [Network](<https://devfeed.tech/topics/network.md>)

Tags: [cryptography](<https://devfeed.tech/tags/cryptography.md>), [gnss](<https://devfeed.tech/tags/gnss.md>), [receiver](<https://devfeed.tech/tags/receiver.md>), [rf](<https://devfeed.tech/tags/rf.md>), [series](<https://devfeed.tech/tags/series.md>), [spoofing](<https://devfeed.tech/tags/spoofing.md>)

## AI overview

This first part of a series explains Galileo's proposed Open Service Navigation Message Authentication (OSNMA), focusing on the TESLA cryptographic scheme and its role in improving trust in GNSS messages. It notes that message authentication cannot by itself prevent sophisticated RF spoofing, but is an important step toward detecting unauthenticated or altered data.

## Source excerpt

Position, velocity and time (PVT) information can be a 'nice to have', but in other circumstances knowing place and time has legal or military importance as well. Heavy vehicles for example are typically outfitted with tachographs that track driver speed and/or location. This has importance for rest regulations, but also to check if loads are actually from where they say they are. Our Global Navigation Satellite Systems so far are broadcasting unauthenticated data, at least to civilian users.