The JWT Best Current Practices (BCP) draft catalogs the different 
implementation mistakes that have been documented and describes how not make 
them.  The timing of this discussion is good because the draft is currently in 
working group last call - through Monday, April 30th.  Have a look at 
https://tools.ietf.org/html/draft-ietf-oauth-jwt-bcp-01.  If you believe that 
additional content is needed, please send your reviews to [email protected].

Also, see Neil Madden's draft 
https://tools.ietf.org/html/draft-madden-jose-siv-mode-02 on misuse-resistant 
cryptography for JOSE.  I've encouraged him to take it forward.  Please provide 
feedback on that as well.

                                -- Mike

-----Original Message-----
From: Cfrg <[email protected]> On Behalf Of Carsten Bormann
Sent: Friday, April 20, 2018 4:03 AM
To: Neil Madden <[email protected]>
Cc: [email protected]; [email protected]
Subject: Re: [Cfrg] [jose] RFC Draft: PASETO - Platform-Agnotic SEcurity TOkens

On Apr 20, 2018, at 12:49, Neil Madden <[email protected]> wrote:
> 
> insecure implementations of old standards don’t go away because you introduce 
> a new standard

Exactly.

If we have to invent a new standard each time an existing standard is 
implemented with a security flaw, we have a lot of work to do.

Insecure implementations exist even of standards such as TLS.  Usually the 
strategy is to fix the implementations.  (It is also a good idea to envision 
what implementers will mess up when creating a new standard.  But there are 
limits to that approach.)

One of the objectives in the definition of COSE was to avoid some of the 
pitfalls of JOSE.
There is also work ongoing to document the security considerations of JOSE 
better, e.g., draft-ietf-oauth-jwt-bcp.

I’d like to focus the energy that appears to be visible here on agreeing good 
SIV constructions and getting them registered with COSE.

Grüße, Carsten

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