Client                                            Server

                                                           +--------+
 ClientHello                                               | Flight |
                       -------->                           +--------+

                                                           +--------+
                       <--------        HelloRetryRequest  | Flight |
                                         + cookie          +--------+


                                                           +--------+
ClientHello                                                | Flight |
 + cookie              -------->                           +--------+



                                              ServerHello
                                    {EncryptedExtensions}  +--------+
                                    {CertificateRequest*}  | Flight |
                                           {Certificate*}  +--------+
                                     {CertificateVerify*}
                                               {Finished}
                       <--------      [Application Data*]



 {Certificate*}                                            +--------+
 {CertificateVerify*}                                      | Flight |
 {Finished}            -------->                           +--------+
 [Application Data]
                                                           +--------+
                       <--------                    [ACK]  | Flight |
                                      [Application Data*]  +--------+

 [Application Data]    <------->      [Application Data]