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Re: [COSE] COSE Support for AES-CTR and AES-CBC

"Zundel, Brent" <brent.zundel@avast.com> Thu, 27 October 2022 15:43 UTC

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From: "Zundel, Brent" <brent.zundel@avast.com>
Date: Thu, 27 Oct 2022 09:43:46 -0600
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Subject: Re: [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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