functional safety and cyber security

safety: 安全,侧重于防止系统的内部故障导致生命财产损失。
security: 安保/防护,侧重于防止外部侵入导致生命财产损失。
对应到汽车领域:functional safety(功能安全)与cyber security(网络安全)

overview

functional safety: absence of unreasonable risk due to hazards caused by malfunctioning behavior of E/E systems.
Cyber security : protection of systems from the theft and damage to their hardware, software or information, as well as from disruption or misdirection of the services they provide.

overview_safety_security.png

功能安全还有个进化版本 SOTIF(Safety of the intended functionality, ISO21448).

method

功能安全和网络安全的方法都需要在考虑整个产品生命周期(life cycle)的基础上,从两个大的方面来实施:技术与流程。
methods_safety_security.png

功能安全的一些方法在ISO26262里有详细的推荐,包括硬件失效分析以及诊断方法,软件开发方法,测试方法等。

security_solutions.png safety_efforts.png

举例

CRC(Cyclic redundancy check) - safety point of view: data error detection
MAC(Message authentication code) - security point of view:data autenticity check.

References

  1. 关于safety和security的翻译问题
  2. Combining functional safety and cyber security
  3. Functional safety and cyber security
  4. The relevance of cyber-security to functional safety of connected and automated vehicles