Client Server ClientHello, client_certificate_type=1609Dot2, server_certificate_type=1609Dot2, --------> ServerHello, {EncryptedExtensions} {client_certificate_type=1609Dot2} {server_certificate_type=1609Dot2} {CertificateRequest} {Certificate} {CertificateVerify} {Finished} {Certificate} <------- [Application Data] {CertificateVerify} {Finished} --------> [Application Data] <-------> [Application Data]