4 OPC UA security architecture ToC Previous Next

4.9 User Authentication ToC Previous Next

User Authentication is achieved when the Client passes user credentials to the Server as specified via Session Services (described in OPC 10000-4). The Server can authenticate the user with these credentials.

The owner (user) of a Session can be changed using the ActivateSession Service in order to meet needs of the application.

User Authentication is not directly part of the Publish-Subscribe communication pattern but is used as part of the SKS associated with this communication pattern.

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