Privacy Issues in Vehicular Ad Hoc Networks.

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Privacy Issues in Vehicular Ad Hoc Networks.
Florian Dötzer BMW Group Research and Technology
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Agenda.

• Introduction
• Privacy in VANETs
• Exemplary Approach
• Future Work / Conclusion

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Agenda.

• Introduction
• Privacy in VANETs
• Exemplary Approach
• Future Work / Conclusion

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Ad-hoc Networks.From Cellular to VANET.
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MANETs and VANETs.Properties.
Decentralized Self - Organizing
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VANET.Application Local Danger Warning.
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VANETs.Security Requirements.
Authentic Information Trust Establishment vs.
Information Matching Availability Node
Cooperation, DoS, Secure Routing Privacy Locatio
n Privacy, Identities, Profiling
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Agenda.

• Introduction
• Privacy in VANETs
• Exemplary Approach
• Future Work / Conclusion

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Privacy.Importance for VANETs.
Cars Personal Devices Position is known Cars
get connected
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VANET Privacy.Example Threats and Attacks.
Automated Law Enforcement Identity
Tracking Configuration Fingerprinting RF-Fingerpri
nting Location Recording Movement
Profiles Communication Relations
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VANET Privacy.Requirements.
Use of pseudonyms (no real-world
identities) Multiple pseudonyms may be
used Pseudonym change ? application
requirements Pseudonyms ? real-world ID
mapping Properties / privileges cryptographically
bound
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Agenda.

• Introduction
• Privacy in VANETs
• Exemplary Approach
• Future Work / Conclusion

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Trusted Authority Approach.A Cars Setup Phase.
Phase I Separation of ID and service usage
Privacy
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Trusted Authority Approach.Normal Usage.
Sender
Phase II Receiver can verify message
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Trusted Authority Approach.Revocation Phase.
Signature OK! BUT Information is not
correct OR sender malfunctioning
Sender
Phase III Disclosure of sender ID
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Trusted Authority Approach.Evaluation.
Pros Fulfills given requirements Provides
strong privacy Cons - Requires independent,
trusted authority - Problem of detecting wrong
messages
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Agenda.

• Introduction
• Privacy in VANETs
• Exemplary Approach
• Future Work / Conclusion

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Future Work.And Open Questions
How to change pseudonyms? Feasibility of
Organizational Solution Feasibility of Smart Card
Approach Location Related Pseudonyms System
without IDs?
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Conclusion.
Privacy is essential for VANETs Privacy must be
considered at system design Trusted authority
approach is far from perfect Additional research
is necessary
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Thanks for Listening.Questions?