Re: [Ntp] Call for adoption: draft-schiff-ntp-chronos

Neta R S <neta.r.schiff@gmail.com> Mon, 02 September 2019 13:03 UTC

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From: Neta R S <neta.r.schiff@gmail.com>
Date: Mon, 2 Sep 2019 16:03:17 +0300
Message-ID: <CAM-HxCN6jDTpSL2UjhNzQM9g3xH7ja-4SozAnDT_=NzFDX4E=A@mail.gmail.com>
To: Harlan Stenn <stenn@nwtime.org>
Cc: ntp@ietf.org
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Subject: Re: [Ntp] Call for adoption: draft-schiff-ntp-chronos
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Hi,

Chronos' security guarantees were analysed in the following paper:
https://www.ndss-symposium.org/wp-content/uploads/2018/02/ndss2018_02A-2_Deutsch_paper.pdf

(which is also referred in the draft).

Best,
Neta

On Mon, Sep 2, 2019 at 3:55 PM Harlan Stenn <stenn@nwtime.org>; wrote:

> I am opposed to the adoption of this draft as anything other than an
> experimental proposal.
>
> On 9/2/2019 5:49 AM, Neta R S wrote:
> > Hi,
> >
> > Chronos has a provable security guarantees compared to the current
> > NTPv4, even when facing MitM attacker.
>
> What *exactly* are these provable security guarantees?
>
> I suspect people are drawing incorrect inferences from "provable
> security guarantees".
>
> H
> --
> > Thus, we suggested Chronos as NTPv4 watchdog and named the draft
> > accordingly.
> > We'll consider your comment regarding the draft's name, but in the worse
> > case (where the MitM controls the client's gateway) I am not sure there
> > is a solution.
> >
> > Regarding Daniel's and Kristof's comments, we agree that experimental
> > might be a more appropriate intended status.
> >
> > Best,
> > Neta
> >
> > On Mon, Sep 2, 2019 at 2:59 PM Miroslav Lichvar <mlichvar@redhat.com
> > <mailto:mlichvar@redhat.com>> wrote:
> >
> >     On Wed, Aug 28, 2019 at 05:37:10AM +0000, Karen O'Donoghue wrote:
> >     > A Secure Selection and Filtering Mechanism for the Network Time
> >     Protocol Version 4
> >     > https://datatracker.ietf.org/doc/draft-schiff-ntp-chronos/
> >     >
> >     > Please reply with your opinion on whether or not the working group
> >     should adopt this document including your willingness to review and
> >     contribute..
> >
> >     I support adoption of this draft. I would like the group to consider
> >     using a slightly different title and more careful use of the word
> >     "secure" in the document. The algorithms improve resiliency against
> >     some MITM attacks, but in the worst case security doesn't change.
> >
> >     --
> >     Miroslav Lichvar
> >
> >     _______________________________________________
> >     ntp mailing list
> >     ntp@ietf.org <mailto:ntp@ietf.org>
> >     https://www.ietf.org/mailman/listinfo/ntp
> >
> >
> > _______________________________________________
> > ntp mailing list
> > ntp@ietf.org
> > https://www.ietf.org/mailman/listinfo/ntp
> >
>
> --
> Harlan Stenn, Network Time Foundation
> http://nwtime.org - be a Member!
>
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