SENTRY-X: Enclave-Assisted Anonymous Yet Auditable Broadcast for Real-Time V2X Systems

Details

• Alternative Title:
  Enhancing V2X Security: A Cryptographic Key Self-Distributed Protocol for Resilient V2V Communication [Project title from the cover]
• Creators:
  Won, Jun Yeon ; Lin, Zhiqiang
• Corporate Creators:
  Ohio State University
• Corporate Contributors:
  United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Evaluation Group Signature Material Resilience Security Traffic Density Transportation Safety Trusted Execution Environment V2X Protocol Vehicle Safety Vehicle To Infrastructure Communications Vehicle To Vehicle Communications

  More +
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report: Final (Aug ‘24 to Dec ‘25)
• Corporate Publisher:
  Center for Automated Vehicles Research with Multimodal Assured Navigation (CARMEN+) Tier-1 University Transportation Center (UTC)
• Abstract:
  We present SENTRY-X, a Trusted Execution Environment (TEE)-assisted protocol for vehicle-to-everything (V2X) communication that reconciles the tension between strict default anonymity and authorized traceability. Unlike traditional approaches that rely on centralized authorities for key distribution, which introduces latency and single points of failure, SENTRY-X empowers vehicles to self-generate and rotate symmetric keys. These keys are distributed to peers via short-lived public keys, which are then anonymously authenticated using group signatures. To maintain low-latency processing in high-density traffic, we introduce two novel key selection mechanisms A hash-based scheme preserves full anonymity with sub-millisecond lookups and a tag-based scheme that enables constant-time selection with a controlled, minimal link ability trade-off. Evaluations on TEE hardware demonstrate that authenticated key exchanges complete in 30ms end-to-end, while broadcast encryption and decryption require less than 1ms. By decoupling privacy from infrastructure availability and confining accountability to a TEE-protected group manager, SENTRY-X provides a practical, scalable foundation for secure V2Xcommunication in infrastructure-optional environments.
• Format:
  PDF
• Funding:
  69A3552348327
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha-512:c59c7862a1e8582d2b0f14e2efe3f4fc96a6f311272dad813bf202819befb888079ad395dd426fc34649a1dfb7df1eeb5cac9c09d2859377e949842000d1db35
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/89271/dot_89271_DS1.pdf
• File Type:
  [PDF - 1.19 MB ]