[Ntp] Antw: [EXT] Re: NTPv5 modular architecture update

[Ulrich Windl <[e-mail]>]

>>> "Dieter Sibold" <[e-mail]> schrieb am 23.07.2020 um 23:02 in
Nachricht <[e-mail]>:
> Hi Doug,
> 
> thanks for the proposed architecture.  From the first reading I have 
> following comments:
> 
> 1. As far as I remember Kristof and Daniel proposed to separate NTP into 
> three parts:
> 
> (i) the on-wire protocol
> (ii) selection and filter engine
> (iii) steering engine
> 
> This would allow to apply different clock control mechanism independent 
> of what selection and filter mechanism are applied.
> 
> 
> 2. The received packet information are basically NTPv4. I see following 
> issues:
> 
> (i) all 4 packet timestamps are not needed. See data minimization draft. 
> Especially, the client must not send t_1 anymore.

What about having an optional data minimization module?

> (ii) root delay and root dispersion are accumulated values. If 
> traceability is an strict requirement, data per hop would be more 
> valuable. Also, the computation of these values are done with respect to 
> NTPv4’s clock steering mechanism. If different clock steering 
> mechanisms are possible in NTPv5 root dispersion and delay may not be 
> good estimators for the desired numbers.
> 
> 
> 3. Security
> 
> Security should be the default. I would even propose to encrypt the 
> timing packets per default.

Authentication module and privacy module?

Regards,
Ulrich Windl