OPC UA communications security
OPC UA server objects establish communication between OPC UA clients and OPC UA
servers.
Secure communication configuration
To establish communication with OPC UA servers, OPC UA clients need the following:
- Endpoint URL of the server. See Endpoint URL.
- Security policy requested by the server. See Minimum security policy.
- Security level of messages requested by the server. See Minimum message security mode.
OPC UA and encryption
OPC UA clients and servers exchange X.509 certificates through a secure channel to:
- Check confidentiality
- Check integrity
- Authenticate applications
For more information, see Certificates and keys
Once OPC UA clients and servers establish secure communication, a session creates to:
- Authenticate users
- Authorize users
- Send information, settings, and commands
For more information, see User identity types for a client.
Provide Feedback