I agree with Mike, many key stores use SHA1 thumbprints.   I don't know of any 
security consideration that makes SHA2 thumbprints better in any practical way.

I don't think that adding SHA 2 thumbprints is something that we need to do now.

John B.

On May 1, 2014, at 1:46 PM, Kathleen Moriarty 
<[email protected]> wrote:

>> 
>> Mike> Per your JWS comment, SHA-1 thumbprints are widely deployed.  I’m
>> aware of no SHA-256 certificate thumbprint deployments.  I’ll note that even
>> if SHA-1 were completely broken, that wouldn’t be a security issue because
>> it’s just being used to generate a digest of publicly available certificate
>> information.  It’s not being used to cryptographically obscure anything.
>> (But that’s actually a discussion for another draft. J)
>> 
> 
> This is in place for the XML equivalents and should be possible for
> JSON.  I used this at least 2 years ago in the XML Oxygen editor.  I
> believe this has been brought up before in terms of JSON, so I am not
> the first.  But it is another draft... I'd like to get through these
> all soon :-)

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