Glossary · Security Controls
Secure Diagnostics: Authenticated and authorised UDS / OBD diagnostic operations on ECUs. Secure diagnostics applies authentication (UDS 0x29 or 0x27 security access), authorisation, and audit logging to diagnostic services that can read sensitive data, write calibrations, or unlock ECU functions.
Where this matters: AUTOSAR Development — Crypto Stack, SecOC and HSM integration
Without it, a workshop tool — or a connected attacker — can perform privileged operations on the bus.
Related terms
Unified Diagnostic Services (ISO 14229) — standard ECU diagnostic and reprogramming protocol.
Boot-time integrity check that an ECU only runs authenticated firmware.
Secure Onboard Communication (SecOC) is the AUTOSAR mechanism that adds message authentication and freshness protection to in-vehicle network traffic.
Need help applying Secure Diagnostics on a programme? Use the contact form to reach Agnile’s engineering team.