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• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  9.1 Overview
  Overview OPC UA Applications typically have ApplicationInstanceCertificates to provide application-level security. They are used for establishing a secure connection using Asymmetric Cryptography. These ApplicationInstanceCertificates are Certificates which are X.509 ... Certificate of the CA). Both types of Certificates provide the same level of security and can be used in Asymmetric Cryptography. The Signatures can be generated using a variety