上海大字 SHANGH AI JIAO TONG INTVEANTY TLS Handshake ATS Client Server Message types Client Hello (generate random number) Code Description SSL version, supported ciphers, ect Hello Request Server Hello (generate random number) Clienthello Cipher Suite(RSA, TSL1. 0, ect) Server Certificate Serverhello Server Key Exchange(public key) CLient Certificate Request] NewSession Ticket Server Hello Done 11 Certificate client Key Exchange (genera number pre-master-secret 12 ServerKey Exchange CLient Certificate] 13 CertificateRequest Certificate Verify Change Cipher Spec 14 ServerHelloDone 15 Certificate verify Change Cipher Spec 16 ClientKey Exchange Application Data 20 Finished Encrypte RecordTLS Handshake