ISO/SAE 21434 Automotive Cybersecurity for C/C++ with CppDepend

ISO/SAE 21434 is the automotive cybersecurity engineering standard. It requires cybersecurity to be managed across the entire vehicle lifecycle — concept, development, production, operations and decommissioning. For software teams, it translates into secure coding practices, weakness management and verifiable cybersecurity controls in ECU software, complementing ISO 26262 (safety) with security.

ISO 21434 Expectations for Code

• Secure coding guidelines: documented and enforced — commonly based on CERT C/C++ and CWE.
• Weakness prevention: systematic elimination of memory-safety and input-validation weaknesses.
• Attack-surface control: minimize and isolate externally reachable code paths (parsers, network stacks, diagnostics).
• Continuous verification: cybersecurity must be re-verified on every change, not once per program.

How CppDepend Supports ISO 21434 Work

• Built-in CERT C/C++ and CWE rule sets for the secure-coding pillar.
• Custom CQLinq rules to enforce your cybersecurity guidelines and project-specific bans (unsafe APIs, weak crypto, hardcoded secrets).
• Attack-surface mapping: dependency graphs reveal exactly which components are reachable from external interfaces — and keep them small.
• Quality gates: block new weaknesses at CI time; trends prove continuous verification to assessors.
• Combined safety + security view: the same platform covers MISRA (ISO 26262) and CERT/CWE (ISO 21434) workflows.

Related Industries & Case Studies

• Case study: MISRA compliance in automotive embedded systems

Related Coding Standards

ISO 26262 · CERT C++ · CWE · MISRA C++