Unified Risk Quantitative Assessment Method for Instrument Functional Safety and Information Security Strategy

Abstract

The invention discloses a unified risk quantitative evaluation method for instrument functional safety and information security strategy. The method of the invention specifically includes establishing an instrument integrated causal failure model in combination with an attack tree and a fault tree; Calculate the failure probability of each functional module of the instrument by means of the possibility and other methods; according to the attributes of the security policy, analyze the instrument security vulnerabilities that can be mitigated by the instrument functional safety and information security policies and the corresponding policy implementation effects; add The protection node establishes an instrument security policy evaluation model; through expert scoring of each functional module of the instrument, quantitative evaluation of the instrument functional safety and information security strategy is carried out according to the change of risk value before and after the implementation of the security policy. The invention can provide a certain theoretical basis for the deployment of the safety strategy in the instrument design process, and improves the accuracy compared with the qualitative evaluation in the current safety standards.

Description

technical field [0001] The invention belongs to the field of instrument safety protection, and more specifically relates to a unified risk quantitative evaluation method for instrument function safety and information security strategies. Background technique [0002] With the rapid development of microcomputer technology and network communication technology, intelligent instruments with functions of measurement, calculation, control, execution, communication, and diagnosis have been widely used in field equipment of industrial control systems. However, compared with traditional instruments, while smart instruments bring great convenience to production and operation, they also face threats such as increasing functional failure factors and accelerated penetration of information attacks. Therefore, there is an urgent need for functional safety and information security protection in smart meters. How to conduct an effective unified quantitative evaluation of instrument security...

AI Technical Summary

Problems solved by technology

The above methods all use qualitative methods to evaluate and describe the safety protection strategy, which lacks accuracy. At present, there is no evaluation method that can quantitatively evaluate the safety risk of the instrument

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