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OPC-10000-81 – OPC Unified Architecture - Part 81: UAFX Connecting Devices and Information ModelPublisher uses the current key to sign or sign and encrypt NetworkMessages , and Subscriber(s) to authenticate or authenticate and decrypt NetworkMessages. The past key, current key and a requested ... number of future keys are distributed from the SKS to the Publisher and the Subscriber(s) using the push or pull model. How past, current and future keys are stored
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OPC-10000-81 – OPC Unified Architecture - Part 81: UAFX Connecting Devices and Information Modelrecommended to update PublisherId after issuing the ReserveCommunicationIdsCmd ; see E.2 for details. For a Subscriber, the Address will be in the PubSubConnection . See 6.13.3.3 on how to set the Address