TLS stands for Transport Layer Security. TLS is a highly secure transport protocol that is designed to provide secure communications over computer/phone networks. TLS is used in Genesys Cloud for security in SIP communications. Basically, TLS employs two components provide security: First, TLS uses certificates to verify that the client and server are authorized to talk to each other over the network. Second, TLS uses encryption to protect the data being transferred between the client and server.