How to enable encryption of VNC

Ultra VNC (Windows):
UltraVNC Server:
1. Move plugin\MSRC4Plugin_NoReg.dsm to UltraVNC directory.
2. Admin Properties -> DSM Plugin -> choose "MSRC4Plugin_NoReg.dsm".
3. Click "use" and click "config".
4. Press "Gen Key".
5. Rename "new_rc4.key" to "rc4.key".

UltraVNC Client:
0. Copy the "rc4.key" from above server.
1. Move plugin\MSRC4Plugin_NoReg.dsm to UltraVNC directory
2. Choose "MSRC4Plugin_NoReg.dsm"
3. Click "Use DSMPlugin".
4. Press "Config" and make sure UltraVNC find the file "rc4.key"
5. You can connect to server now.

Reference:
UltraVNC: http://ultravnc.sourceforge.net/
DSM Plugin: http://msrc4plugin.home.comcast.net/index.html

RealVNC (Windows):
RealVNC Server:
1. Options -> Security -> Generate Keys
2. Options -> Security -> Encryption -> "Always On" (or "Prefer On")

ps1: The key of the server is in registry "RSA_Private_Key" in HKEY_CURRENT_USER\Software\RealVNC\WinVNC4.
ps2: You can use this command "winvnc4.exe log=*:stderr:100" to see the detail log of VNC server.

RealVNC Client:
1. Change the encryption to "Always On" (or "Prefer On")
2. Connect to the server
3. You will see the message "***WARNING: The VNC Server's signature has changed since you last connected to it! ***" ...
4. Click Yes.
5. Input the password
6. You can control the remote machine now.

ps1: The key of the remote machine is in registry "KnownHosts" in HKEY_CURRENT_USER\Software\RealVNC\VNCViewer4KnownHosts.
ps2: You can use this command "vncviewer.exe -console -log=CConnection:stderr:100" to see the detail log of VNC server.

RealVNC (Linux):
Please check this page for detail instructions.
http://www.realvnc.com/products/enterprise/4.2/x0.html

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