Re: [pkix] Proposal for working on PKIX revocation open issues

On 2014-11-15 02:42, Dr. Massimiliano Pala wrote:
> Dear PKIX Enthusiasts,

Thanx :-)

Just for my curiosity, have the OpenCA team implemented EST?

If not, I think this highlights the core problem which is adoption of standards.
Microsoft, Intel, et. al. spent *hundreds of millions of dollars* on standardization
of TPMs only to find that the bulk of the mobile device market (their competitors...)
had taken another, more agile path.

Since HTTP seems to the lowest common denominator for all networked
devices, it looks like that you will run into serious adoption issues.

I must admit that I don't understand what problem you want to solve
in the context of *client authentication*.  The client's ability
to gather revocation information abouts its own keys?  That's hardly
a problem worth solving.  It sounds like a W3C proposal that I once saw
which was about introducing an API at the client-side for revoking your
own certificate(s).

As you can see the remains of the PKIX WG still don't want to discuss
requirements like imposed by "Derived Credentials" which actually is
a core PKI application that eventually will be used by everybody.

Anders

>
> Although great work has been done in the past... 20 years.. (?) on
> providing very good protocols in the PKIX work, I think that we all
> agree that we still have some unresolved issues. In particular, the
> revocation is still a hot topic (especially for online environments)
> could use improvement over the current status of things. In particular,
> by looking at current specifications, some work is needed to address
> concerns especially in non-web environments.
>
> For example, current specifications about OCSP stapling do not address
> the case of client authentication (which is a widespread use case
> outside the web environment) or, again, defining some new transport
> protocols for delivering OCSP responses which might reduce operational
> costs for revocation service providers.
>
> After proposing the idea to Stephen Farrell and Kathleen Moriarty, we
> would like to know if there might be interests in participating in
> updating the status of the current revocation mechanisms for PKIX. This
> said, the scope of the work I am proposing is very limited. Specifically:
>
> (a) Defining new transport protocols for revocation information
> availability (e.g., OCSP over DNS or OCSP over LDAP)
> (b) (Possibly) defining a more lightweight revocation mechanisms (e.g.
> Lightweight Revocation Tokens)
> (c) (Possibly) helping other working groups to revise and update how
> revocation information are provided (e.g., the client authentication case)
> (d) (Possibly) introducing privacy consideration when it comes to
> revocation checking
>
> Because of these considerations, I am proposing to start a conversation
> - for now, Stephen and Kathleen suggested we use (or "abuse") the "The
> Right Key" mailing list to see if there might be enough interest in the
> work from implementers to address these issues. I know that we (OpenCA)
> are interested in implementing these features, and we would like that
> the work would be standardized.
>
> At minimal, I would like (a) to happen. This could be achieved in 6
> months (and we might not even need to meet). (b) and (c) are also
> desirable in order to provide better support for non-browsers and small
> devices (AFAIK, some work might be relevant for DICE). (d) is something
> that we should, I think, all be mindful and at least some considerations
> should be provided. The scope of the work, however, will be limited to
> revocation.
>
> Please, if you are interested and would like to start the discussion,
> post your opinion on therightkey@ietf.org - also, please, circulate this
> proposal to anybody who might be interested in collaborating on this issue.
>
> Please also note that we did decide not to use the pkix@ietf.org mailing
> list because we thought therightkey@ietf.org might provide a more active
> pool of implementors.
>
> Looking forward to receive all your inputs and start working on the topics.
>
> Cheers,
> Max
>
>
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