Transportlayersecurity, Tls Handshake, Ssl Handshake.
certificate locally, you can use OpenSSL which is an open-source cryptographic library. openssl req -x509 -out localhost.crt -keyout localhost.key \ -newkey rsa:2048 -nodes -sha256 \ -subj '/CN=localhost' -extensions EXT -config <( \ printf "[dn]\nCN=localhost\n[req]\ndistinguished_name =