I support adoption.

John B.

> On Mar 23, 2026, at 8:07 AM, Michael Jones <[email protected]> 
> wrote:
> 
> Unsurpisingly (with me being an author), I also support adoption.
>  
>                                                 -- Mike
>  
> From: Emil Lundberg <[email protected]>
> Sent: Monday, March 23, 2026 8:06 AM
> To: Ivaylo Petrov <[email protected]>
> Cc: cose <[email protected]>; 
> [email protected]; Cose Chairs Wg 
> <[email protected]>
> Subject: Re: [COSE] Call for adoption of 
> draft-lundberg-cose-two-party-signing-algs-07
>  
> I (one of the authors) support adoption. This is a prerequisite we need for a 
> proposed WebAuthn extension for signing arbitrary data 
> <https://github.com/w3c/webauthn/wiki/Explainer:-WebAuthn-raw-signing-extension>,
>  which would use this to perform signing operations with keys held in a 
> WebAuthn authenticator. In particular, the COSE_Sign_Args structure is needed 
> for passing additional parameters needed to sign using a private key derived 
> using ARKG 
> <https://datatracker.ietf.org/doc/draft-bradleylundberg-cfrg-arkg/>.
>  
> Thank you!
>  
> Emil Lundberg
> Staff Engineer | Yubico <http://www.yubico.com/>
>  
>  
>  
> Den mån 23 mars 2026 kl 10:43 skrev Ivaylo Petrov 
> <[email protected] 
> <mailto:[email protected]>>:
> Dear all,
> 
> This note starts a three-week call for adoption for Split Signing Algorithms 
> for COSE 
> https://datatracker.ietf.org/doc/draft-lundberg-cose-two-party-signing-algs/. 
>  Please indicate here by Monday, April 13, 2026 whether you are in favor of 
> adoption or not, and the reasons for your position.
>  
> Thank you,
>  
> --
> Mike & Ivo
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