OPC UA communication
9.2 Security at OPC UA
Communication
176
Function Manual, 05/2021, A5E03735815-AJ
Secure channel
OPC UA uses the private and public key of client and server to establish a secure connection,
the secure channel. Once the secure connection has been established, the client and server
generate an internal key only known to them which they both use for signing and encrypting
messages. This symmetric process (a shared key) is much faster than asymmetric processes
(private and public key).
See also
Creating self-signed certificates (Page 178)
Certificates with OPC UA (Page 177)
Secure Communication (Page 40)
Using certificates with TIA Portal
https://support.industry.siemens.com/cs/ww/en/view/109769068
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