Shulou(Shulou.com)06/02 Report--

The functional safety of automotive electronic and electrical systems has been paid more and more attention with the development of intelligent driving, new energy and other emerging technologies. In the process of landing the international functional safety standard ISO 26262, we have encountered many thorny problems: how to correctly and effectively implement HARA to obtain appropriate security objectives? How can security analysis be conducted to ensure that security requirements are complete and adequate? How to verify the security of the system / software / hardware design? How to evaluate and calculate the hardware index? How to ensure the traceability, consistency and integrity of the development process?

Function introduction

Medini analyze tool is a professional functional security development platform tool, which conforms to the whole development process of ISO 26262. Its functions cover all development activities required by ISO 26262. Its main functions are as follows:

Refer to ISO26262 2018 project definition ♦ supports function definition, behavior design, initial architecture modeling; ♦ provides HAZOP templates for failure identification, etc. Hazard Analysis and risk Assessment ♦ provides a driving scenario database to support HARA scenario analysis; ♦ provides standard HARA templates to make the HARA analysis process clearer and simpler. Security requirements development ♦ provides semi-formal requirements templates that meet the requirements of ISO 26262 to ensure the standardization and integrity of requirements writing; ♦ supports security requirements export based on security analysis (such as FTA) to ensure that security requirements are not left out; ♦ supports the creation of UML requirements trees to meet visual requirements traceability relationship establishment and maintenance ♦ supports interaction with mainstream requirements management tools such as DOORS, DNG, PTC, etc. Security architecture design ♦ supports the architecture design of standard SysML language, assigns requirements to architecture and realizes the traceability of requirements and design; ♦ supports importing output model files of mainstream modeling software such as Simulink, SCADE, EA, Rhapsody and so on. Security Analysis FMEA ♦ supports the generation of FMEA tables based on SysML design models to ensure the direct relevance and integrity of FMEA and its analysis objects (schemas). It is also convenient to update FMEA; ♦ to support the creation of action libraries (prevention/detection measures) during architecture optimization, and to manage measures to integrate all security mechanisms of ISO26262 part5 appendix D. Security Analysis FTA ♦ supports the creation of FTA based on the design model of SysML, which ensures the direct relationship between FTA and its analysis objects (architecture), and facilitates mutual verification with FMEA; ♦ supports qualitative FTA analysis such as minimum cut set and importance, as well as quantitative FTA (PMHF) calculation. FMEDA ♦ provides five failure rate calculation manuals, such as SN29500, IEC62380, and IEC 61709 newly recommended by ISO 26262. ♦ supports the automatic generation of FMEDA tables recommended by ISO 26262 based on Excel/CSV format BOM. Strong traceability ♦ supports the creation of traceability relationships for any element within the project, such as requirements association at different levels, allocation relationship between requirements and design architecture, and corresponding relationship between architecture and security analysis verification. ♦ supports visual display of dependency relationships between functions and architectures.

♦ supports visual presentation of traceability relationships such as Function net and Failure net.

Application & case

GM-- Lane maintenance Auxiliary system functional Safety Analysis GM chose medini analyze mainly because it supports the whole process of functional safety development of ISO 26262, ensures the consistency of the development process, is compatible with and integrates the original tools of GM to form a complete tool chain, and automatically generates a standard ISO 26262 work report, which greatly improves the efficiency of functional safety analysis of GM lane maintenance auxiliary system. The analysis of Mobileye-- autopilot safety strategy Mobileye regards medini analyze as the core tool of its autopilot safety strategy development, and divides the autopilot safety goal into functional safety ISO26262 security goal and expected functional safety SOTIF security goal, which systematically decouples the relationship between functional safety and expected functional safety. It not only realizes the functional safety development of the product, but also actively explores the landing process of SOTIF by using medini analyze.

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