Safety assessment of virtualization computing platform for avionics system of civil aircraft

民机航电系统虚拟化计算平台功能安全评估研究

¹ School of Computer Science, Northwestern Polytechnical University, Xi’an 710072, China
² Xi’an Aeronautical Computing Technique Research Institute, Xi’an 710068, China
³ School of Cybersecurity, Northwestern Polytechnical University, Xi’an 710072, China

Received: 20 March 2023

Abstract

Aiming at the main problems that affect the security of airborne computing platform after virtualization, such as time-space isolation, fault isolation and schedulability, this paper studies the security level evaluation of airborne computing platform under virtualization environment. Considering the characteristics of virtualized avionics system, a security calculation method based on analytic hierarchy process(AHP) and gray correlation analysis(GARD) is proposed. The safety evaluation decision tree of airborne virtualization computing platform is established, and the weight of each safety capability is calculated by AHP method, and the overall safety score of the system is given. On this basis, combined with GRAP method and referring to the safety evaluation of avionics system, the safety level with the highest adaptability between the test system and DAL safety level requirements is calculated, realizing security grade evaluation of airborne computing platform under virtualization environment.

摘要

围绕虚拟化后影响机载计算平台安全的时空隔离性、故障隔离性、可调度性等主要问题, 开展虚拟化环境下机载计算平台的安全等级评定研究, 考虑虚拟化后航电系统的特点, 提出了一种基于层次分析法(AHP)和灰度关联分析法(GARD)的安全性计算方法。建立了机载虚拟化计算平台安全评估判断树, 利用AHP方法计算了各安全能力的权重, 给出了系统整体安全性得分, 并在此基础上, 结合GRAP方法, 参照航空电子系统安全性评估, 计算得出了测试系统与DAL安全等级要求适配度最高的安全等级。