Security profiles
In the Niagara OPC UA implementation the combination for security mode and security policy form a security profile. Different profiles specify different details, such as which encryption algorithms are required for which OPC UA functions. Some of the profiles specify security functions and others specify other functionality that is not related to security.
A Sign with Security Policy profile offers these options:
SignBasic128RSA15 provides medium channel security during commutation. It transports messages as plain text with a digital signature.
SignBasic256 provides medium to high channel security during commutation. It transports messages as plain text with a digital signature.
SignBasic256SHA256 provides high channel security during commutation. It transports messages as plain text with a digital signature.
A Sign and Encrypt with Security Policy profile offers these options:
SignEncryptBasic128RSA15 provides medium channel security during communication. It encrypts messages transports the data with a digital signature.
SignEncryptBasic256 provides medium to high channel security during commutation. It encrypts messages and transports data with a digital signature.
SignEncryptBasic256SHA256 provides the highest channel security during commutation. It encrypts messages and transports data with a digital signature.
The other profiles include a warning message that points out the security risk involved. You or an administrator must acknowledge the warning, which the driver logs in the system for audit purposes.