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Manipulation-proof data transmission between automation devices

A technology of automation devices and automation equipment, applied in transmission systems, electrical components, etc., can solve the problem of not considering data packets, etc., and achieve the effect of high security

Inactive Publication Date: 2015-11-25
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this alternative does not take into account the possibility of unauthorized feeding of data telegrams within the automation device itself

Method used

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  • Manipulation-proof data transmission between automation devices
  • Manipulation-proof data transmission between automation devices
  • Manipulation-proof data transmission between automation devices

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0032] figure 1 An automation device 10 is shown. For the purposes of the following explanation it is assumed by way of example that the automation system 10 is an automation system of a power supply network. However, the invention can also be applied to other automation systems, for example automation systems for the automation of production processes or industrial plants.

[0033] The automation system 10 comprises so-called field devices 11 a , 11 b and 11 c , which are arranged spatially close to the automation supply network (not shown) and which can be, for example, electrical protective devices or electrical control devices. These field devices are used, for example, for the automated monitoring and protection of components of the power supply network and for the remote-controlled opening and closing of electrical switches in the power supply network. Further examples of field devices in automation systems for power supply networks are, for example, power quality devi...

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PUM

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Abstract

According to the invention, in order to be able to protect the transmission of data telegrams between automation devices (20a, 20b) against errors and manipulations using relatively low computing capacity, matching lists (26) having sequences of secret character strings are produced in both automation devices (20a, 20b) by using a one-way function multiple times, and a check identifier is produced for a data telegram having one of the secret character strings. The check identifier is compared to a comparison check identifier in the receiving automation device (20b), which comparison check identifier likewise has been produced using the secret character string. The data telegram is classified as trustworthy only if the comparison check identifier matches the check identifier. The invention further relates to automation devices (20a, 20b) and to an automation system (10).

Description

technical field [0001] The invention relates to a method for transmitting data telegrams from a first automation device of an automation system to a second automation device of an automation system. The invention also relates to a corresponding automation device and an automation system with such an automation device. Background technique [0002] For the automation of power supply networks, industrial processes or manufacturing plants, automation plants are used which usually comprise a plurality of automation devices. In the case of a power supply network, the automation system has, for example, a protection device, a control device, a station control device and a grid control device as automation devices. In this case, the mentioned automation devices undertake different tasks for controlling, monitoring and protecting the power supply network. [0003] Automated processes are often safety-critical applications. For example, there are increased safety requirements with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06
CPCH04L63/126H04L2463/081
Inventor G.纽曼
Owner SIEMENS AG