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Provision of secure communication in a communications network capable of operating in real time

A communication network and capability technology, applied in the field of computer programs, can solve problems such as communication protocols that are not suitable for real-time capabilities, and achieve the effect of reducing network load

Active Publication Date: 2019-05-21
SIEMENS AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0030] In this environment, there is also the problem that the higher the (cryptographic) security measures are implemented in the OSI layers / levels, the more these (cryptographic) security measures will contribute to the temporal behavior (Zeitverhalten)
Therefore, these (cryptographic) security measures are not suitable for real-time capable communication protocols such as Profinet etc.

Method used

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  • Provision of secure communication in a communications network capable of operating in real time

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Embodiment Construction

[0071] According to the figure, the IO controller IOC and the IO device IOD exchange messages m, n, for example via a communication network, for example Profinet IRT. The IO controller IOC sends, for example, a message m (Profinet IRT telegram) to the IO device. The safety interface S1 assigned to the IO controller reads the message m together and decides according to the (filtering) rules that can be implemented in the filter function F1: the integrity check for the message m is activated, wherein the safety interface optionally are constructed as sensors.

[0072] This filtering function may include rules for inspection or monitoring of messages. Therefore it can be stipulated that:

[0073] - which message type to monitor (e.g. only Profinet messages, no http messages);

[0074] - which message from which sender(s) or which receiver(s) to monitor;

[0075] - whether these messages should be monitored randomly or according to conditions that can be given in advance (e.g....

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Abstract

The invention relates to a device (IA) for integrity checking, which is used to provide secure communication between at least two communication partners (IOC, IOD) inside a communications network capable of operating in real time, particularly in the environment of industrial production and / or automation, said device comprising: a unit for receiving a formed first integrity reference value (I1) for at least one isolated message (m) and / or for receiving at least one formed second integrity reference value (I2) for at least one isolated message; a unit for correlating the first integrity reference value (I1) with the at least second integrity reference value (I2) and for comparing same; and a unit for emitting a warning and / or alarm signal, which is provided for a position initiating corresponding counter-measures when the correlated integrity reference values deviate from each other.

Description

technical field [0001] The invention relates to a method, a device and a communication device as well as an associated computer program (product) for providing secure communication within a real-time-capable communication network, in particular in the context of industrial production and / or automation. Background technique [0002] In today's automation facilities, IT systems are used in order to control the manufacturing process or the individual production steps. To enable field devices such as sensors and actuators (actuators) to communicate with automation devices in such installations, a so-called fieldbus is used as a communication bus system. Standardized protocols such as IEC 61158 exist for communication. There are real-time-capable Ethernet-based field buses, which are summarized, for example, in the IEC 61784-2 standard. Frequently used real-time capable fieldbuses are Profibus and Profinet, Ethercat and Modbus. [0003] The security of industrial fieldbus prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
CPCH04L9/3236H04L63/123H04L9/0643H04L63/0227H04L63/08H04L63/1408H04L63/1441H04L63/20
Inventor K.菲舍尔M.海因特尔
Owner SIEMENS AG
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