Minimum message security mode
OPC UA defines security levels for messages between the server and client.
TIP:
In the properties of an OPC UA server object, set the minimum-security level required by the server for the client.
You can select the following
message security modes.
- None. Messages may be unsigned and unencrypted.
- Sign. Messages must be signed or signed and encrypted.
- Signature and cryptography. Messages must be signed and encrypted.
For more information, see Add an OPC UA client and Configure the OPC UA client.
security mode
message
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