Thanks Mike!

For the sake of clarity, would it make sense to strike the word “public” from 
the quoted sentence, since it may potentially be a symmetric key that is being 
referenced?

Andrew

On 10/6/14, 11:22 PM, "Mike Jones" 
<[email protected]<mailto:[email protected]>> wrote:

Yes, the “kid” would refer to the CEK in that case.

From: jose [mailto:[email protected]] On Behalf Of Andrew Biggs (adb)
Sent: Monday, October 06, 2014 8:43 PM
To: [email protected]<mailto:[email protected]>
Subject: [jose] question regarding JWE header "kid"' attribute

Section 4.1.6 of the JWE draft describes the “kid” attribute of the JWE header 
as a "hint [that] references the public key to which the JWE was encrypted”.  
If the JWE were encrypted in direct key agreement mode, would it be incorrect 
for the “kid” attribute to reference the CEK used in the JWE?

Thanks,
Andrew

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