Re: [core] Fwd: New Version Notification for draft-tiloca-lpwan-8824-update-00.txt

Marco Tiloca <marco.tiloca@ri.se> Mon, 27 March 2023 07:18 UTC

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Archived-At: <https://mailarchive.ietf.org/arch/msg/core/FwZApNL2kfNICAnmvyL9X3pnqLE>
Subject: Re: [core] Fwd: New Version Notification for draft-tiloca-lpwan-8824-update-00.txt
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Hello Carles,

Thanks for the good input!

I will raise this point during the presentation at the LPWAN session on 
Thursday.

Best,
/Marco

On 2023-03-27 12:21, Carles Gomez Montenegro wrote:
>
> 	
> You don't often get email from carles.gomez@upc.edu. Learn why this is 
> important <https://aka.ms/LearnAboutSenderIdentification>
> 	
>
> Hello Marco, and co-authors,
>
> Thanks for the RFC 8824 update effort.
>
> In 6lo we have a document that enables the transmission of 
> SCHC-compressed IPv6(/UDP/CoAP) packets over IEEE 802.15.4 networks [1].
>
> In RFC 8824, there is the following text, which applies to the above 
> draft:
> "If an LPWAN is the Layer 2 technology being used, the SCHC security 
> considerations discussed in [RFC8724 
> <https://eur05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.rfc-editor.org%2Frfc%2Frfc8824.html%23RFC8724&data=05%7C01%7Cmarco.tiloca%40ri.se%7C44be5ae867e5496e479808db2e7270f1%7C5a9809cf0bcb413a838a09ecc40cc9e8%7C0%7C0%7C638154841283725058%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=qS%2FhThLrQJOhZov4KjLjM0oIEGPgR7WBngcIzcwd2Is%3D&reserved=0>] 
> continue to apply. When using another Layer 2 protocol, the use of a 
> cryptographic integrity-protection mechanism to protect the SCHC 
> headers is REQUIRED."
>
> In the context of a possible RFC 8824 update, we (coauthors of [1]) 
> were wondering whether the "REQUIRED" requirement level in RFC 8824 
> could be lowered to "SHOULD". The motivation for using SCHC to 
> compress headers is performance (in terms of energy, latency, 
> bandwidth, etc.). Since IEEE 802.15.4 allows a "no security" mode, it 
> might be interesting to support SCHC-compressed CoAP headers over the 
> "no security" mode as well, which would involve lower overhead (of 
> course, at the expense of reduced security, for scenarios where the 
> "no security" mode may be reasonable), and where SCHC would allow a 
> greater performance improvement versus the default scenario.
>
> Perhaps, could this topic be considered in the RFC 8824 update?
>
> (Also, now that SCHC is expanding beyond LPWANs, the previous comment 
> may also apply for other L2 technologies...)
>
> Cheers,
>
> Carles (on behalf of the authors of [1])
>
> [1] https://datatracker.ietf.org/doc/draft-ietf-6lo-schc-15dot4 
> <https://eur05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-6lo-schc-15dot4&data=05%7C01%7Cmarco.tiloca%40ri.se%7C44be5ae867e5496e479808db2e7270f1%7C5a9809cf0bcb413a838a09ecc40cc9e8%7C0%7C0%7C638154841283725058%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=zcveIOHO2LAe62CaFtCz14ZseQjzqx5pVNx2HZ%2B%2BQaA%3D&reserved=0>
>
>
>
>
> On Mon, 13 Mar 2023 at 19:40, Marco Tiloca 
> <marco.tiloca=40ri.se@dmarc.ietf.org> wrote:
>
>     Hello LPWAN,
>
>     (also CCing CoRE for information)
>
>     We have recently submitted the new document
>     draft-tiloca-lpwan-8824-update [1].
>
>     This draft considers the use of SCHC for header compression of
>     CoAP messages and aims at updating RFC 8824, by especially:
>
>     - Defining the compression of CoAP options introduced after RFC 8824.
>
>     - Updating the compression of the CoAP option OSCORE, in the light
>     of recent developments related to the security protocol OSCORE
>     (RFC 8613).
>
>     - Clarifying how the SCHC compression handles the CoAP payload marker.
>
>     - Defining how the SCHC compression works in the presence of CoAP
>     proxies.
>
>
>     Comments and feedback are very welcome!
>
>     Best,
>     /Marco
>
>
>     [1]
>     https://datatracker.ietf.org/doc/draft-tiloca-lpwan-8824-update/
>     <https://eur05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-tiloca-lpwan-8824-update%2F&data=05%7C01%7Cmarco.tiloca%40ri.se%7C44be5ae867e5496e479808db2e7270f1%7C5a9809cf0bcb413a838a09ecc40cc9e8%7C0%7C0%7C638154841283725058%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=3oEyKI4AG4rBZpG4wu9E2jipt8tPA54UDieqdMIjVJc%3D&reserved=0>
>
>
>     -------- Forwarded Message --------
>     Subject: 	New Version Notification for
>     draft-tiloca-lpwan-8824-update-00.txt
>     Date: 	Mon, 13 Mar 2023 08:10:00 -0700
>     From: 	internet-drafts@ietf.org
>     To: 	Ivan Martinez <ivanmarinomartinez@gmail.com>
>     <mailto:ivanmarinomartinez@gmail.com>, Laurent Toutain
>     <Laurent.Toutain@imt-atlantique.fr>
>     <mailto:Laurent.Toutain@imt-atlantique.fr>, Laurent Toutain
>     <laurent.toutain@imt-atlantique.fr>
>     <mailto:laurent.toutain@imt-atlantique.fr>, Marco Tiloca
>     <marco.tiloca@ri.se> <mailto:marco.tiloca@ri.se>
>
>
>
>
>     A new version of I-D, draft-tiloca-lpwan-8824-update-00.txt
>     has been successfully submitted by Marco Tiloca and posted to the
>     IETF repository.
>
>     Name: draft-tiloca-lpwan-8824-update
>     Revision: 00
>     Title: Clarifications and Updates on using Static Context Header
>     Compression (SCHC) for the Constrained Application Protocol (CoAP)
>     Document date: 2023-03-13
>     Group: Individual Submission
>     Pages: 16
>     URL:
>     https://eur05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Farchive%2Fid%2Fdraft-tiloca-lpwan-8824-update-00.txt&data=05%7C01%7Cmarco.tiloca%40ri.se%7Cc512bbd0c9f74b8d16a108db23d50a19%7C5a9809cf0bcb413a838a09ecc40cc9e8%7C0%7C0%7C638143170284458189%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000%7C%7C%7C&sdata=GmsWKwYDNrX7H2liDSpZSZmgLQ%2BxbHpGMoAVX523IjE%3D&reserved=0
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>
>     Abstract:
>     This document clarifies, updates and extends the method specified in
>     RFC 8824 for compressing Constrained Application Protocol (CoAP)
>     headers using the Static Context Header Compression and fragmentation
>     (SCHC) framework. In particular, it considers recently defined CoAP
>     options and specifies how CoAP headers are compressed in the presence
>     of intermediaries. Therefore, this document updates RFC 8824.
>
>
>
>     The IETF Secretariat
>
>
>     _______________________________________________
>     core mailing list
>     core@ietf.org
>     https://www.ietf.org/mailman/listinfo/core
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>

-- 
Marco Tiloca
Ph.D., Senior Researcher

Phone: +46 (0)70 60 46 501

RISE Research Institutes of Sweden AB
Box 1263
164 29 Kista (Sweden)

Division: Digital Systems
Department: Computer Science
Unit: Cybersecurity

https://www.ri.se