The parameter ServerCipherSuites defines the DTLS 1.3 cipher suite(s) that are used for data security of the PubSub communication. Supported cipher suites are described in OPC 10000-7. This is a list of cipher suites that the server will accept if offered by a client. In DTLS PubSub a client will only offer one cipher suite. The server will then either accept that one cipher suite as it is listed in ServerCipherSuites or reject it if it is not included in ServerCipherSuites.

Note that the cipher suite describes the data encryption and data authenticity algorithms used. Key agreement and certificate signature algorithms are designated via the OPC UA Client Server Security Policy.