User identity types for a client

When a client connects to a server, the client transmits information that identifies the user.

Types of UA authentication include:

Anonymous Identity Token: No information available on the user.
Username/password Identity Token: User identified by username and password. The client sends the user password to the server.
X.509 Certificate: User identified by an X.509v3 certificate. The client sends the server a signature created with the private key associated with the certificate.

TIP: The certificate must be installed and trusted on the server.
Common Name
must specify the name of the user to log in. The user must exist on the OPC UA server. For more information, see Create a certificate.

The credentials must be encrypted with its public key even if there are no message signature and encryption.

The type of authentication is set in the properties of the OPC UA client object.

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