CLC IEC/TR 62541-2:2021

OPC unified architecture - Part 2: Security Model CLC IEC/TR 62541-2:2021

Publication date:   Aug 16, 2021

General information

60.60 Standard published   Jul 16, 2021


CLC/TC 65X Industrial-process measurement, control and automation

Technical Report

25.040.40   Industrial process measurement and control | 35.100.01   Open systems interconnection in general



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This part of IEC 62541 describes the OPC Unified Architecture (OPC UA) security model. It describes the security threats of the physical, hardware, and software environments in which OPC UA is expected to run. It describes how OPC UA relies upon other standards for security. It provides definition of common security terms that are used in this and other parts of the OPC UA specification. It gives an overview of the security features that are specified in other parts of the OPC UA specification. It references services, mappings, and Profiles that are specified normatively in other parts of the OPC UA Specification. It provides suggestions or best practice guidelines on implementing security. Any seeming ambiguity between this part and one of the other normative parts does not remove or reduce the requirement specified in the other normative part.

Life cycle


CLC/TR 62541-2:2010


CLC IEC/TR 62541-2:2021
60.60 Standard published
Jul 16, 2021


Adopted from IEC/TR 62541-2:2020 IDENTICAL