FWIW: I agree with Baszi in all points.

Rainer

> -----Original Message-----
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of Balazs Scheidler
> Sent: Tuesday, January 31, 2006 2:35 PM
> To: Tom Petch
> Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> Subject: Re: [Syslog] Threat model requirements discussion
> 
> On Tue, 2006-01-31 at 11:28 +0100, Tom Petch wrote:
> 
> > So I want to see a simpler solution - eg keyed hash - first 
> and a more complex
> > one which includes encryption as phase two (2007?).
> > 
> > And yes, my views are coloured by SNMP which I have worked 
> with for many years,
> > where, as I have said before, users tell me they must have 
> encryption but it
> > usually turns out they have not yet learnt about the 
> concept of differing
> > threats.
> 
> My points:
> * syslog is way different than SNMP traps, it really does contain
> sensitive information (not just link up/down). 
> * adding TLS is very simple from the implementation point of view:
> adding a new transport layer to the software stack does not really
> change the software (can be done without changing the software at all
> via a wrapper like stunnel), message signatures is a big 
> change in _all_
> senders
> * adding TLS is very simple from the protocol specification point of
> view: define a way to wrap messages to an "envelope" (e.g. NL
> termination, or byte counter) and wrap messages into TLS
> * adding message signatures is difficult both implementation and
> specification wise, syslog-sign is far from being simple
> 
> I'd say that the specification and implementation something like
> syslog-sign is at least 3-5 times as big work as doing the same with a
> drop-in package like TLS.
> 
> But I guess this is a yes/no argument so we have to come up with a
> decision. I would propose an agenda like:
> 
> 1) syslog-protocol
> 2) syslog-protocol over TLS
> 3) message integrity/authenticity checking in syslog-protocol
> 
> Or maybe even start work on 2) and 3) in parallel.
> 
> -- 
> Bazsi
> 
> 
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