ISO 24534-5:2011

Overview

ISO 24534-5:2011 - part of the ISO 24534 family - defines secure communications using symmetrical techniques for Electronic Registration Identification (ERI) of vehicles. It specifies interfaces and protocol requirements for secure data exchange between the onboard Electronic Registration Tag (ERT) and ERI readers/writers (onboard or external). The standard focuses on symmetric cryptography (shared secret keys in trusted user groups) to protect vehicle identifiers and related registration data while supporting interoperability, privacy and national / international use-cases.

Key Topics

• Scope and purpose
  • ERI for unique electronic identification of vehicles across their life-cycle (manufacture, in‑use, resale, end-of-life).
  • Support for national authorities, safety, crime reduction and commercial services.
• Security model
  • Use of symmetric encryption based on shared secret keys within closed user communities.
  • Security services: confidentiality, data integrity, entity authentication, access control.
• Interfaces and communication
  • Onboard interface between ERT and onboard ERI reader/writer.
  • Short-range air interface (e.g., DSRC) between onboard equipment and roadside readers/writers.
  • Remote access interfaces for back-office or remote systems.
• Protocol and modelling
  • Abstract transaction definitions and protocol data units for ERI exchanges.
  • ASN.1 module definitions (Annex A) for data encoding.
• Operational and compliance material
  • Operational scenarios (informative) and PICS (Protocol Implementation Conformance Statement) pro forma (normative) to guide deployment and testing.

Applications

ISO 24534-5:2011 is practical for:

• National authorities implementing interoperable electronic vehicle registration and enforcement.
• Vehicle manufacturers embedding lifetime ERTs for identification and lifecycle management.
• ITS integrators and roadside equipment vendors building DSRC/short-range readers and writers.
• Tolling operators, law enforcement, and fleet managers needing trusted vehicle identity in real time.
• Security architects and privacy officers ensuring ERI implementations comply with data protection rules.

The standard helps ensure secure, interoperable ERI transactions that support roaming vehicles, privacy-preserving identification, and anti‑misuse protections.

Related Standards

• ISO 24534 (Parts 1–4): Architecture, operational requirements, vehicle data, and asymmetric techniques.
• ISO 24534-3: Vehicle data definitions.
• ISO/IEC 8825-2 (ASN.1 PER), ISO 14816 (AVI numbering/data), ISO 15628 / EN 12834 (DSRC application layer).

Keywords: ISO 24534-5, Electronic Registration Identification, ERI, symmetric encryption, ERT, ERI reader, DSRC, secure vehicle identification, automatic vehicle identification, vehicle lifecycle management.