To match what Russ put in the IANA Considerations section:

I approve the following

id-mod-prefixlen-2025 (86) in 
https://www.iana.org/assignments/smi-numbers/smi-numbers.xhtml#security-smime-0 

and

id-ct-prefixlenCSVwithCRLF (57) in 
https://www.iana.org/assignments/smi-numbers/smi-numbers.xhtml#security-smime-1 

spt

> On Dec 3, 2025, at 17:13, Oliver Gasser <[email protected]> wrote:
> 
> Revision -09 of the I-D has now been published which incorporates this and 
> many other changes from the reviews.
> 
> Cheers,
> 
> Oliver
> 
> On 12/3/25 10:34 PM, David Dong via RT wrote:
>> Adding in the rest of the authors; could you make this update?
>> Thank you!
>> Best regards,
>> David Dong
>> IANA Services Sr. Specialist
>> On Wed Dec 03 21:30:27 2025, [email protected] wrote:
>>> Yes. This would work great! Can I suggest the following string for the
>>> module:
>>> 
>>> id-mod-plm-2025 (TBD0)
>>> 
>>> That would make the registrations:
>>> 
>>> id-mod-plm-2025 (86) in https://www.iana.org/assignments/smi-
>>> numbers/smi-numbers.xhtml#security-smime-0
>>> 
>>> and
>>> 
>>> id-ct-prefixlenCSVwithCRLF (57) in
>>> https://www.iana.org/assignments/smi-numbers/smi-
>>> numbers.xhtml#security-smime-1
>>> 
>>> spt
>>> 
>>>> On Dec 3, 2025, at 13:19, David Dong via RT <drafts-expert-review-
>>>> [email protected]> wrote:
>>>> 
>>>> Hi Sean,
>>>> 
>>>> Would this proposed update from Russ be OK if they were to implement
>>>> it? This is still on the telechat agenda for tomorrow, if you would
>>>> be able to let us know today.
>>>> 
>>>> Thank you!
>>>> 
>>>> Best regards,
>>>> 
>>>> David Dong
>>>> IANA Services Sr. Specialist
>>>> 
>>>> On Wed Dec 03 17:41:54 2025, [email protected] wrote:
>>>>> I suggest an Appendix with this ASN.1 Module:
>>>>> 
>>>>> ~~~
>>>>>   PrefixLengthsModule-2025
>>>>>     { iso(1) member-body(2) us(840) rsadsi(113549)
>>>>>       pkcs(1) pkcs9(9) smime(16) mod(0) TBD0 }
>>>>> 
>>>>> DEFINITIONS IMPLICIT TAGS ::=
>>>>> BEGIN
>>>>> 
>>>>> -- EXPORTS ALL --
>>>>> 
>>>>> IMPORTS
>>>>>  CONTENT-TYPE
>>>>>  FROM CryptographicMessageSyntax-2010 -- in [RFC6268]
>>>>>  { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1)
>>>>>    pkcs-9(9) smime(16) modules(0) id-mod-cms-2009(58) } ;
>>>>> 
>>>>> ContentSet CONTENT-TYPE ::= { ct-prefixlenCSVwithCRLF, ... }
>>>>> 
>>>>> ct-prefixlenCSVwithCRLF CONTENT-TYPE ::=
>>>>>  { TYPE OCTET STRING IDENTIFIED BY id-ct-prefixlenCSVwithCRLF }
>>>>> 
>>>>> id-ct-prefixlenCSVwithCRLF OBJECT IDENTIFIER ::=
>>>>>  { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1)
>>>>>    pkcs-9(9) smime(16) ct(1) TBD1 }
>>>>> 
>>>>> END
>>>>> ~~~
>>>>> 
>>>>> We will also need IANA to assign an OID for the module.  This is a
>>>>> minor update to the IANA considerations section.
>>>>> 
>>>>> Russ
>>>>> 
>>>>>> On Dec 2, 2025, at 5:09 PM, David Dong via RT <drafts-expert-
>>>>>> review-
>>>>>> [email protected]> wrote:
>>>>>> 
>>>>>> Dear Authors/Chairs/ADs,
>>>>>> 
>>>>>> Please see below for feedback for the SMI Security for S/MIME CMS
>>>>>> Content Type registration from the expert.
>>>>>> 
>>>>>> Best regards,
>>>>>> 
>>>>>> David Dong
>>>>>> IANA Services Sr. Specialist
>>>>>> 
>>>>>> On Tue Dec 02 20:45:44 2025, [email protected] wrote:
>>>>>>> Did a quick look at this and have a questions about why there’s no
>>>>>>> ASN.1 module that formally defines the content type? The knock on
>>>>>>> effects for adding a module that come to mind would be:
>>>>>>> - another section for the ASN.1 module
>>>>>>> - another IANA request for SMIME ASN.1 Module Arc
>>>>>>> - normative refs to X.680, X.690, & RFC 5911 (imports CONTENT-
>>>>>>> TYPE)
>>>>>>> 
>>>>>>> Cheers,
>>>>>>> spt
>>>>>>> 
>>>>>>>> On Dec 1, 2025, at 18:50, David Dong via RT <drafts-expert-
>>>>>>>> review-
>>>>>>>> [email protected]> wrote:
>>>>>>>> 
>>>>>>>> Dear Sean Turner (cc: opsawg WG),
>>>>>>>> 
>>>>>>>> As the backup designated expert for the SMI Security for S/MIME
>>>>>>>> CMS
>>>>>>>> Content Type registry, can you review the proposed registration
>>>>>>>> in
>>>>>>>> draft-ietf-opsawg-prefix-lengths-08 for us? Would you be able to
>>>>>>>> review this before the IESG telechat this week?
>>>>>>>> 
>>>>>>>> Please note that Russ is a co-author on this document.
>>>>>>>> 
>>>>>>>> Please see:
>>>>>>>> 
>>>>>>>> https://datatracker.ietf.org/doc/draft-ietf-opsawg-prefix-
>>>>>>>> lengths/
>>>>>>>> 
>>>>>>>> If this is OK, when the IESG approves the document for
>>>>>>>> publication,
>>>>>>>> we'll make the registration at:
>>>>>>>> 
>>>>>>>> https://www.iana.org/assignments/smi-numbers/
>>>>>>>> 
>>>>>>>> With thanks,
>>>>>>>> 
>>>>>>>> David Dong
>>>>>>>> IANA Services Sr. Specialist
>>>>>>>> 
>>>>>>>> On Thu Nov 13 23:10:41 2025, david.dong wrote:
>>>>>>>>> Dear Sean Turner (cc: opsawg WG),
>>>>>>>>> 
>>>>>>>>> As the backup designated expert for the SMI Security for S/MIME
>>>>>>>>> CMS
>>>>>>>>> Content Type registry, can you review the proposed registration
>>>>>>>>> in
>>>>>>>>> draft-ietf-opsawg-prefix-lengths-08 for us? Please note that
>>>>>>>>> Russ
>>>>>>>>> is
>>>>>>>>> a
>>>>>>>>> co-author on this document.
>>>>>>>>> 
>>>>>>>>> Please see:
>>>>>>>>> 
>>>>>>>>> https://datatracker.ietf.org/doc/draft-ietf-opsawg-prefix-
>>>>>>>>> lengths/
>>>>>>>>> 
>>>>>>>>> The due date is November 27th.
>>>>>>>>> 
>>>>>>>>> If this is OK, when the IESG approves the document for
>>>>>>>>> publication,
>>>>>>>>> we'll make the registration at:
>>>>>>>>> 
>>>>>>>>> https://www.iana.org/assignments/smi-numbers/
>>>>>>>>> 
>>>>>>>>> With thanks,
>>>>>>>>> 
>>>>>>>>> David Dong
>>>>>>>>> IANA Services Sr. Specialist
>>>>>>>> 
>>>>>> 
>>>> 
> 

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