Yealink VC800 - Page 246

Administrator’s Guide for Yealink VC800 Video Conferencing System
232
 DHE-RSA-AES128-SHA
 DHE-DSS-AES128-SHA
 AES128-SHA
 IDEA-CBC-SHA
 DHE-DSS-RC4-SHA
 RC4-SHA
 RC4-MD5
 EXP1024-DHE-DSS-DES-CBC-SHA
 EXP1024-DES-CBC-SHA
 EDH-RSA-DES-CBC-SHA
 EDH-DSS-DES-CBC-SHA
 DES-CBC-SHA
 EXP1024-DHE-DSS-RC4-SHA
 EXP1024-RC4-SHA
 EXP1024-RC4-MD5
 EXP-EDH-RSA-DES-CBC-SHA
 EXP-EDH-DSS-DES-CBC-SHA
 EXP-DES-CBC-SHA
 EXP-RC4-MD5
The following figure illustrates the TLS messages exchanged between the system and TLS server
to establish an encrypted communication channel:
Step1: The system sends “Client Hello” message proposing SSL options.
Step2: Server responds with “Server Hello” message selecting the SSL options, sends its public
key information in “Server Key Exchange” message and concludes its part of the negotiation
with “Server Hello Done” message.
Step3: The system sends key session information (encrypted by server’s public key) in the
“Client Key Exchange” message.
Step4: Server sends “Change Cipher Spec” message to activate the negotiated options for all
future messages it will send.