Clause 8specifies the OPC UA Information Modelfor a Security Key Service(SKS). The functionality and behaviour of an SKS is described in 5.4.4. It defines the distribution framework for cryptographic keys used for message security. A Publisheror Subscribercan pull the keys from the SKS or the SKS can push the keys to the Publisheror Suscriber. The sequences for pull and push are described in 188.8.131.52.
The PubSubKeyServiceTypedefines the Methodfor pull access to security keys and the related management of SecurityGroups.This ObjectTypeis used for the PublishSubscribe Objectif only the Security Key Servicefunctionality is provided. If the PubSubconfiguration functionality is provided, the PublishSubscribeTypeis used instead.
The push targets are organized by the PubSubKeyPushTargetFolderTypeand represented by instances of the PubSubKeyPushTargetType. These instances are used by the SKSto push the security keys for related SecurityGroupsinto the Publisheror Subscriber.