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Re: [TLS] -draft8447bis: rename Support Group Elliptic curve groups space

John Mattsson <john.mattsson@ericsson.com> Thu, 28 March 2024 15:31 UTC

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From: John Mattsson <john.mattsson@ericsson.com>
To: Sean Turner <sean@sn3rd.com>, TLS List <tls@ietf.org>
Thread-Topic: [TLS] -draft8447bis: rename Support Group Elliptic curve groups space
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Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/QU1kpJdGNPsIFbjTG2KlDLMdcPk>
Subject: Re: [TLS] -draft8447bis: rename Support Group Elliptic curve groups space
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Hi,

It would actually be good to change the name of the registry from “Supported Groups” as the new PQC key exchange algorithms are not groups.

Cheers,
John Preuß Mattsson

From: TLS <tls-bounces@ietf.org> on behalf of Sean Turner <sean@sn3rd.com>
Date: Thursday, 28 March 2024 at 15:53
To: TLS List <tls@ietf.org>
Subject: [TLS] -draft8447bis: rename Support Group Elliptic curve groups space
<author hat>

**WARNING: Potential bikeshed**

-connolly-tls-mlkem-key-agreement has suggested that code points for the NIST PQ be registered in the TLS Supported Groups IANA registry [1].  Currently [2], the registry is carved up into three blocks as follows:

Range: 0-255, 512-65535
Registration Procedures: Specification Required
Note: Elliptic curve groups

Range 256-511
Registration Procedures: Specification Required
Note: Finite Field Diffie-Hellman groups

Assuming that the proposal in -connolly-tls-mlkem-key-agreement is the path for PQ KEM algorithms (and maybe regardless of whether this is the path), we should really replace the “Elliptic curve groups” note in the 0-255, 512-65535 range row with something else.  I am open to suggestions, but would like to propose “unallocated”. I have submitted the following issue:
https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftlswg%2Frfc8447bis%2Fissues%2F54&data=05%7C02%7Cjohn.mattsson%40ericsson.com%7C0a5a0e0174b640b9535508dc4f36c377%7C92e84cebfbfd47abbe52080c6b87953f%7C0%7C0%7C638472343825594155%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=FKpJyM8%2BPLS7Wd1zNGlZoqhFFEQuLNNRzY8bsUQxegA%3D&reserved=0<https://github.com/tlswg/rfc8447bis/issues/54>
and this PR:
https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftlswg%2Frfc8447bis%2Fpull%2F55&data=05%7C02%7Cjohn.mattsson%40ericsson.com%7C0a5a0e0174b640b9535508dc4f36c377%7C92e84cebfbfd47abbe52080c6b87953f%7C0%7C0%7C638472343825602619%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=nMQWHlYdoSNn9yNstiB2wNLQw5IZl%2BfHtf14UvOInd8%3D&reserved=0<https://github.com/tlswg/rfc8447bis/pull/55>
to address this.

spt

[1] https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.iana.org%2Fassignments%2Ftls-parameters%2Ftls-parameters.xhtml%23tls-parameters-8&data=05%7C02%7Cjohn.mattsson%40ericsson.com%7C0a5a0e0174b640b9535508dc4f36c377%7C92e84cebfbfd47abbe52080c6b87953f%7C0%7C0%7C638472343825608404%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=f3oRbu1I2ThwoKYyK%2BlyO1SDPOrsc3mXShCT%2BeBM3ls%3D&reserved=0<https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-8>

[2] Originally, RFC 8442 defined the name of the registry as "EC Named Curve Registry” and then RFC 7919 re-named it “Supported Groups” and carved out the FFDH space.
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