Visible to the public FastTrust: Fast and Anonymous Spatial-Temporal Trust for Connected Cars on Expressways

TitleFastTrust: Fast and Anonymous Spatial-Temporal Trust for Connected Cars on Expressways
Publication TypeConference Paper
Year of Publication2018
AuthorsLyu, C., Pande, A., Zhang, Y., Gu, D., Mohapatra, P.
Conference Name2018 15th Annual IEEE International Conference on Sensing, Communication, and Networking (SECON)
Keywordsanonymous messaging, authentication, authorisation, automobiles, connected cars, cryptography, data privacy, entropy-based commitment, Expressways, Fast and Anonymous Spatial-Temporal Trust, FastTrust, Intelligent Transportation System, intelligent transportation systems, malicious cars, message authentication, privacy, privacy properties, private information, Protocols, pseudonym-varying scheduling, pubcrawl, Real-time Systems, Receivers, resilience, Resiliency, road safety, Scalability, secure authentication algorithm, security properties, spatial-temporal messages, Spatial-Temporal Trust mechanism, Symmetric-Key Cryptography, Trusted Computing

Connected cars have received massive attention in Intelligent Transportation System. Many potential services, especially safety-related ones, rely on spatial-temporal messages periodically broadcast by cars. Without a secure authentication algorithm, malicious cars may send out invalid spatial-temporal messages and then deny creating them. Meanwhile, a lot of private information may be disclosed from these spatial-temporal messages. Since cars move on expressways at high speed, any authentication must be performed in real-time to prevent crashes. In this paper, we propose a Fast and Anonymous Spatial-Temporal Trust (FastTrust) mechanism to ensure these properties. In contrast to most authentication protocols which rely on fixed infrastructures, FastTrust is distributed and mostly designed on symmetric-key cryptography and an entropy-based commitment, and is able to fast authenticate spatial-temporal messages. FastTrust also ensures the anonymity and unlinkability of spatial-temporal messages by developing a pseudonym-varying scheduling scheme on cars. We provide both analytical and simulation evaluations to show that FastTrust achieves the security and privacy properties. FastTrust is low-cost in terms of communication and computational resources, authenticating 20 times faster than existing Elliptic Curve Digital Signature Algorithm.

Citation KeylyuFastTrustFastAnonymous2018