Re: [Ntp] Antwort: Re: Antwort: Re: NTS4UPTP Rev 03 - Formal request for WG adoption (SUPPORT)

Daniel Franke <> Tue, 01 June 2021 21:23 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 335363A27DF for <>; Tue, 1 Jun 2021 14:23:01 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -2.098
X-Spam-Status: No, score=-2.098 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: (amavisd-new); dkim=pass (2048-bit key)
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id wH6n0X-DK8Fi for <>; Tue, 1 Jun 2021 14:22:56 -0700 (PDT)
Received: from ( [IPv6:2607:f8b0:4864:20::42b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by (Postfix) with ESMTPS id DCE2E3A27DD for <>; Tue, 1 Jun 2021 14:22:56 -0700 (PDT)
Received: by with SMTP id x73so506763pfc.8 for <>; Tue, 01 Jun 2021 14:22:56 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=iofGNwzTu+kktdD4QAhRThMXO0Z48ThSEFy63N0mTkA=; b=B3HSPjaYunYdP9KFnuvr58qXWDVFAOJRDwUtn49XEG8TBtvGHK7dW+cX4bNZ4GUqBF 8ZlFhPrHTGOZAcVVqfjgHdpyggIuBFeHhOYZU4uCAtPap+3fWdBdVC/dQIgB51CIrXPQ jyVafYIU3aqjVlAfJQenTdYeVvxsCH/8kLUtrLNgd+lONu1p/Wt0QlznyD6rOOY8jGVQ wrZqnHZQGJa/wrtvm2/3En7TLy01OKWn+OtlRNxC4PhpSdCBBuXsPb2xD6dQ9vU3zJ7X U8wLTGZH4PWbGIaeVZV7bbGQJ5tOJ8RxbZTDug458WhJfuSHyyUlghAE/Bm8GTaFtD4d R9TA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=iofGNwzTu+kktdD4QAhRThMXO0Z48ThSEFy63N0mTkA=; b=na0FwC6l3esWqqXEpqfllGCBlBUD6RtwLByQxTvvHouwVfVI0NFcW7LjMz5V4ZBtcJ W8z/p3orjzltGFFjbJmTJSvKq1UU+kyR4uNsqud94miemBWhJpnBDJpSqkL7bQvbSSf2 GBOiK4MY07H7j6yObbXRT/Xq5YJz7nlRkJ3kIRM1W0NPRTsIjyB41ERzrfpZC37FPokx Ll1dnM4SdwyBeX6y/P3TQw8U/3igXewcpCFdI7vFy1NGt8so4r3kr22V0QtF+7T6+tUB 50Ye6HGkH4eRD+rfh+8m9AgShmP5DcFXnKGqkmOeM6iDrVumMEANMK38v5xJXekH6qSe aaKg==
X-Gm-Message-State: AOAM530EtgmhTliN/ZvXWKue3W/P8qwgs8XXZ+21C/gmICqBBVGZ4zOk ddPAUUqOhlGEWn5I1BGvyz+Vyf3UTACVhh7Y6dQ=
X-Google-Smtp-Source: ABdhPJy6jqCkt6KVt8QDi32NRm/55A6k8YuytlywhnDpncfK+5kl0h1Zt/0LcoBhtXQGu8eW/2mAldNDR0DqxEs8R5s=
X-Received: by 2002:a63:d710:: with SMTP id d16mr29674063pgg.214.1622582575280; Tue, 01 Jun 2021 14:22:55 -0700 (PDT)
MIME-Version: 1.0
References: <> <> <>
In-Reply-To: <>
From: Daniel Franke <>
Date: Tue, 1 Jun 2021 17:22:44 -0400
Message-ID: <>
Cc: NTP WG <>
Content-Type: text/plain; charset="UTF-8"
Archived-At: <>
Subject: Re: [Ntp] Antwort: Re: Antwort: Re: NTS4UPTP Rev 03 - Formal request for WG adoption (SUPPORT)
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Tue, 01 Jun 2021 21:23:01 -0000

On Tue, Jun 1, 2021 at 5:14 PM <> wrote:
> Can you elaborate on how the details of timescale commensuration and the workings of plausibility intervals would be different here than in other aplications?

For example, NTP packets have root delay and precision fields that
should be incorporated into error bound computation. Roughtime doesn't
have anything analogous to these so the calculation would be
different. Some time protocols are based on UTC, some are based on
TAI, and if you mix the two you need to do the conversion and have a
secure way of obtaining DTAI. If you're using Roughtime then you
should get this from the DTAI tag in the Roughtime response if
possible, but if you're using NTS4NTP you probably need to find a
secure source from which to download an NTP leap second file and take
it from that.