I suspect what he meant to say is, if using Windows Authentication, as
you say, that occurs before an encrypted link is set up, what are the
vulnerabilities.

James B. White
C.S.H. Consultants Pty Ltd
Phone....:+61(0)3 97151033
Fax......:+61(0)3 97151400
Mobile...:+61(0)418 558 184
 
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of James Weatherall
Sent: Tuesday, 29 March 2005 02:00
To: 'Singh, Harjit (Mission Systems)'; vnc-list@realvnc.com
Subject: RE: Real VNC question

Harjit,

VNC Enterprise & Personal Editions use asymmetric cryptography for
server
authentication.

Whether or not a server will accept a connection depends upon whether
QueryConnect is set, whether the connection originates from a host
allowed
by the Hosts setting, whether the viewer can support the server's
allowed
security methods, and whether the user can supply the required
credentials
(usually username & password).

I don't know what you mean by "will the Windows authentication take
place
across the encrypted session".  Obviously the user authentication stage
of
the VNC session will never be sent in the clear, regardless of whether
the
session is to be encrypted.  Is that what you mean?

Regards,

Wez @ RealVNC Ltd.


-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Singh, Harjit (Mission Systems)
Sent: 28 March 2005 16:20
To: vnc-list@realvnc.com
Subject: Real VNC question


It seems that first step is to authenticate the server followed by
Windows
authentication. I have following questions:
 
1. Is it true that public key cryptography methodology is used for
server
authentication? 
 
2. What factor will determine a server to communicate to any arbitrary
client communicating to it?
 
3. Will the windows authentication take place across the encrypted
session ?
 
Regards,
Harjit Singh
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