> On 27 May 2020, at 08:49, Hannes Tschofenig <hannes.tschofe...@arm.com 
> <mailto:hannes.tschofe...@arm.com>> wrote:
> 
> Hi all, 
>  
> I wanted to bring up another topic that may need to be clarified in 
> draft-tschofenig-uta-tls13-profile-04
>  
> RFC 7925 says the following about client certificates: 
> 
>  <>
> “4.4.2 <https://tools.ietf.org/html/rfc7925#section-4.4.2>.  Certificates 
> Used by Clients
>  
>    For client certificates, the identifier used in the SubjectAltName or
>    in the leftmost CN component of subject name MUST be an EUI-64.
>       “
>  
Hmm. It doesn’t say how to include it in SAN fields. Anyone that understand how?

> It turns out that many IoT deployments use identifiers different than EUI-64 
> numbers, and populate these identifiers in other places in the X.509 
> certificate.
Agree
>  
> I believe we have to update this recommendation to match deployment reality.
>  
Sounds like a fair plan.

/O
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