Why to use Certificates
To provide mutual authentication for both client and server PKI certificates are required. The TLS protocol allows client-server applications to communicate and prevent from security attacks such as eavesdropping, message tampering, and message forgery.
Note that you set a meaningful expiration date for your certificates. The expiration date must match the needs of your security requirements, according to the planned facility runtime and/or security upgrade cycles.
Note also our WinCC OA Security trainings (see Trainings), e.g. the "Certified WinCC OA Security Workshop".