After more 1 000 000 (one million) views on forum for 1.5.0.x development versions... and 1.6.1.0, 1.6.3.0-dev versions A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: https://forum.uvnc.com/viewtopic.php?t=38095 Feedback is welcome
old plugins
On initial startup, encryption is not active
The rfb version info is recv unencrypted and get activated after the viewer recv the passwd request
New plugins
Activate it from start
The rfb version info is encrypted
The initial message can tell (no encryption) if it isn't activated yet, this change later.