user authentication - PLC Programming & Automation

OPC UA Security Policies and User Authentication: What to Enable, and What It Costs

Table of security policies against the three message security modes, showing that mode None is legal only with policy None, that Basic128Rsa15 and Basic256 are deprecated and should be left off, and that Basic256Sha256 and the two Aes policies are usable with Sign or SignAndEncrypt

OPC UA Security Policies and User Authentication: What to Enable, and What It Costs One RSA-2048 private-key operation measured 3.363 ms on the laptop this was written on, and one pass of AES-256 over a kilobyte of notification measured about 2.1 microseconds. That ratio, roughly sixteen hundred to one, is the whole of the OPC … Read more