Thank you for this additional context about IANA and JOSE. I find it very 
helpful.

________________________________
From: COSE <[email protected]> on behalf of Zundel, Brent 
<[email protected]>
Sent: Thursday, October 27, 2022 8:43:46 AM
To: [email protected]
Subject: RE: [EXTERNAL][COSE] COSE Support for AES-CTR and AES-CBC


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Having only recently become aware of this thread, I apologize for the lateness 
of this, but feel compelled to share my concerns as well.

While it is true that AES-CTR and AES-CBC have been included in RFCs for years, 
I would like to direct the attention of folks to the IANA registry for JOSE, 
where AES-CBC and AES-CTR are marked as 'Prohibited' for JOSE Implementations.

I don't understand going to the effort of defining AES-CTR and AES-CBC for CBOR 
when these modes are already recognized elsewhere as bad enough to prohibit.

--
Brent Zundel
Principle Crypto Engineer - Avast
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