24,611 research outputs found
Privacy in Inter-Vehicular Networks: Why simple pseudonym change is not enough
Inter-vehicle communication (IVC) systems disclose rich location information about vehicles. State-of-the-art security architectures are aware of the problem and provide privacy enhancing mechanisms, notably pseudonymous authentication. However, the granularity and the amount of location information IVC protocols divulge, enable an adversary that eavesdrops all traffic throughout an area, to reconstruct long traces of the whereabouts of the majority of vehicles within the same area. Our analysis in this paper confirms the existence of this kind of threat. As a result, it is questionable if strong location privacy is achievable in IVC systems against a powerful adversary.\u
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Receiver-Autonomous Spoofing Detection: Experimental Results of a Multi-antenna Receiver Defense Against a Portable Civil GPS Spoofer
In this work we demonstrate the use of a dual antenna
receiver that employs a receiver-autonomous angle-ofarrival
spoofing countermeasure. This defense is
conjectured to be effective against all but the most sophisticated spoofing attempts. The technique is based
on observation of L1 carrier differences between multiple
antennas referenced to a common oscillator.
We first employ a moderately sophisticated spoofer to
"fool" a single-antenna civil receiver. We then deploy the
same attack after augmenting the receiver with an
additional antenna and with receiver-autonomous spoofdetection
software. The work discusses the experimental
results together with various issues related to sensitivity,
probability of false alarm, impact of carrier multipath,
line-bias-calibration, and physical setup and security.
We suggest that this work is important to the community
as it provides experimental validation of a low-cost
technique for receiver-autonomous spoofing detection.
Furthermore, the technique, when combined with physical
security of the antenna installation, provides a strong
defense against even a sophisticated attack.
The receiver employed is an L1-only civil GPS receiver
with multiple antenna capability. The GPS chipset
employed is the venerable GP2015/GP2021 that has been
freely available for over a decade. As such, this receiver is
representative of many civil receivers in use today for a
variety of applications. Multiple antennas are enabled
either through multiple independent RF front ends and
correlators or via antenna multiplexing into a single RF
front end and correlator bank.Aerospace Engineering and Engineering Mechanic
A survey on pseudonym changing strategies for Vehicular Ad-Hoc Networks
The initial phase of the deployment of Vehicular Ad-Hoc Networks (VANETs) has
begun and many research challenges still need to be addressed. Location privacy
continues to be in the top of these challenges. Indeed, both of academia and
industry agreed to apply the pseudonym changing approach as a solution to
protect the location privacy of VANETs'users. However, due to the pseudonyms
linking attack, a simple changing of pseudonym shown to be inefficient to
provide the required protection. For this reason, many pseudonym changing
strategies have been suggested to provide an effective pseudonym changing.
Unfortunately, the development of an effective pseudonym changing strategy for
VANETs is still an open issue. In this paper, we present a comprehensive survey
and classification of pseudonym changing strategies. We then discuss and
compare them with respect to some relevant criteria. Finally, we highlight some
current researches, and open issues and give some future directions
Satellite Navigation for the Age of Autonomy
Global Navigation Satellite Systems (GNSS) brought navigation to the masses.
Coupled with smartphones, the blue dot in the palm of our hands has forever
changed the way we interact with the world. Looking forward, cyber-physical
systems such as self-driving cars and aerial mobility are pushing the limits of
what localization technologies including GNSS can provide. This autonomous
revolution requires a solution that supports safety-critical operation,
centimeter positioning, and cyber-security for millions of users. To meet these
demands, we propose a navigation service from Low Earth Orbiting (LEO)
satellites which deliver precision in-part through faster motion, higher power
signals for added robustness to interference, constellation autonomous
integrity monitoring for integrity, and encryption / authentication for
resistance to spoofing attacks. This paradigm is enabled by the 'New Space'
movement, where highly capable satellites and components are now built on
assembly lines and launch costs have decreased by more than tenfold. Such a
ubiquitous positioning service enables a consistent and secure standard where
trustworthy information can be validated and shared, extending the electronic
horizon from sensor line of sight to an entire city. This enables the
situational awareness needed for true safe operation to support autonomy at
scale.Comment: 11 pages, 8 figures, 2020 IEEE/ION Position, Location and Navigation
Symposium (PLANS
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