Sabrina, thanks.

Authors,
FYI, we have updated the descriptions in Table 1 to exactly match the IANA 
registry. The change is visible here:
https://www.rfc-editor.org/authors/rfc9921-lastrfcdiff.html

Alice Russo
RFC Production Center

On Feb 23, 2026, at 3:56 PM, Sabrina Tanamal via RT <[email protected]> 
wrote:
> 
> Hi Alice, 
> 
> Apologies for the delay. I’ve updated the registry to reflect the changes 
> below, but keeping the brackets in place so we can continue linking to RFC 
> 3161:
> 
> https://www.iana.org/assignments/cose/cose.xhtml#header-parameters
> 
> Let me know if any other changes are needed. 
> 
> Thanks,
> Sabrina
> 
> On Wed Feb 18 22:39:13 2026, [email protected] wrote:
>> IANA,
>> 
>> Please update these descriptions as follows to match the edited
>> document (https://www.rfc-editor.org/authors/rfc9921.txt).
>> 
>> From https://www.iana.org/assignments/cose/cose.xhtml#header-
>> parameters
>> 
>> Registry:
>> 
>> 3161-ttc  269   [RFC3161] timestamp token: Timestamp then COSE
>> 3161-ctt  270   [RFC3161] timestamp token: COSE then Timestamp
>> 
>> 
>> New:
>> 
>> 3161-ttc 269  Timestamp Token per RFC 3161: Timestamp, Then COSE
>> 3161-ctt 270  Timestamp Token per RFC 3161: COSE, Then Timestamp
>> 
>> 
>> (For background:
>> https://mailarchive.ietf.org/arch/msg/auth48archive/PU8J-
>> NdZGSN5J5yMKkhlHZNLC-o/)
>> 
>> Thank you.
>> 
>> Alice Russo
>> RFC Production Center
> 

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