From OpenSCADAWiki
Notes
During implementation of the modules of supporting OPC-UA was detected several inconsistencies with the official SDK specification OPC-UA:
- OPC-UA Part 6 on page 27 contains an image of a handshake to establish a secure channel. The creation message of session signed by a symmetric key of the client and encrypted by server's. In fact, both signature and encryption of the server key made.
- OPC-UA Part 4 on page 141 contains a description of the data structure signatures, where first goes the data signature, and then the string algorithm. In fact, the reverse order is implemented here.