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A simulation judgment method for survival capability of network information system

A technology of survivability and network information, which is applied in the field of simulation and determination of the survivability of network information systems to achieve the effect of reducing investment costs

Inactive Publication Date: 2008-05-28
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the above typical formal methods are conceptual expressions, and it is difficult to apply them in the qualitative and quantitative analysis of survivability without a lot of follow-up work.

Method used

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  • A simulation judgment method for survival capability of network information system
  • A simulation judgment method for survival capability of network information system
  • A simulation judgment method for survival capability of network information system

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Embodiment Construction

[0042] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0043] 1) Related definitions

[0044] According to Figure 1, we define the parameters related to service survivability:

[0045] Define 1T c is the communication time required for critical services, T e is the service processing time, T s is the data provision time, T is the service completion time expected by the user, where T>T c +T p +T s ,T d =T-(T c +T p +T s ) is the service delay that users can tolerate.

[0046] Definition 2 Service survivability is: in the network environment, the probability that the information system can provide key services within the user's expected time T, the calculation method is: Sur = key _ job _ ok key _ job × 100 ...

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Abstract

The invention provides a simulated survival ability judging method for a network information system. A work flow model for the system is established to describe the state of the structure and the performance of the system when, ideally, no failure occurs; a failure model and an error-tolerant model are established for resources with failure possibility to describe the failing process and reactions after the failure of a member; an information system survival model is established with combination of the two to describe the influence of certain failure resources on the whole system in a special network environment; a simulation method is adopted to inject safety events into the synthesized model, specifically including failure rate of the member, influence of invasive events on the member and survivability of the member; through statistics of accessible state information in SPN, survivability parameters of the information system service are computed to perform evaluation of the survival ability of the information system. The invention can analyze the completion quality of services of a network information system in a specific application environment according to the survival attributes of the construction members.

Description

(1) Technical field [0001] The invention relates to a method for analyzing and judging network security. (2) Background technology [0002] With the rapid development and wide application of computers and networks, most of the infrastructure related to the normal operation of society is composed and controlled by computers and networks, and Information System (IS) plays a very important role in it. Therefore, the security and reliability of information systems directly affect the operation of key infrastructure such as power systems and financial systems. Survivability research is a new direction in the development of network security technology at home and abroad. It refers to the ability of an information system to complete key tasks in a timely manner when it is attacked, malfunctioned or accidental. The important basic work in survivability research is formal modeling technology, which accurately describes and analyzes the system workflow through standardized formal lan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张乐君杨武杨永田刘猛莫锡昌
Owner HARBIN ENG UNIV
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