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Re: [core] FW: New Version Notification for draft-liu-core-coap-delay-attacks-01.txt

Göran Selander <goran.selander@ericsson.com> Mon, 13 November 2017 10:08 UTC

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From: Göran Selander <goran.selander@ericsson.com>
To: Carsten Bormann <cabo@tzi.org>
CC: "Zhujintao (Julian)" <jintao.zhu@huawei.com>, "core@ietf.org" <core@ietf.org>
Thread-Topic: [core] FW: New Version Notification for draft-liu-core-coap-delay-attacks-01.txt
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Date: Mon, 13 Nov 2017 10:08:43 +0000
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Subject: Re: [core] FW: New Version Notification for draft-liu-core-coap-delay-attacks-01.txt
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On 2017-11-13 16:41, "Carsten Bormann" <cabo@tzi.org> wrote:

>On Nov 13, 2017, at 15:07, Göran Selander <goran.selander@ericsson.com>
>wrote:
>> 
>> 3. Your draft could be implemented as an application of CoAP, i.e. in
>>the
>> CoAP payload. Considering that the freshness requirements may be very
>> specific depending on use cases, maybe some parts should be left to the
>> application?
>
>(That is actually true of the nonce-based freshness, too.
>Application-layer is the way nonce-based freshness is done in the Web.
>The Echo option proposal just reflects that there is an advantage in
>having a common way of doing this.)

Correct. The intention with Echo is to provide a small generic solution
for nonce-based freshness which can be used by many applications. I would
like something similar with time-based freshness.

Göran

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