Re: [mmox] OGP scalability concerns

Morgaine <morgaine.dinova@googlemail.com> Thu, 02 April 2009 10:32 UTC

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Date: Thu, 2 Apr 2009 11:33:03 +0100
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From: Morgaine <morgaine.dinova@googlemail.com>
To: "Meadhbh Hamrick (Infinity)" <infinity@lindenlab.com>
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Subject: Re: [mmox] OGP scalability concerns
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On Thu, Apr 2, 2009 at 12:53 AM, Meadhbh Hamrick (Infinity) <
infinity@lindenlab.com>; wrote:

>
> John quoted<http://www.ietf.org/mail-archive/web/mmox/current/msg01211.html>>>> There will be millions of worlds in an Internet-scale metaverse, which
>>> makes the concept of interop through trust agreements far too narrow.  Trust
>>> loses its meaning entirely when scaled to millions, becoming mere paperwork
>>> or "security theater".
>>>
>>
> +1. what's your suggestion?
>
>
Jason's suggestion<http://www.ietf.org/mail-archive/web/mmox/current/msg01305.html>was
accurate I believe, namely that centralized control of identity, trust
and authentication is neither appropriate nor accepted on an Internet
scale.  To that I'll add another suggestion, based on my experience in the
defense industry.

Trust agreements *between* organizations are only useful in the context of
transactions *at the level of* organizations, but are very inappropriate for
dealing with transactions at other (lower or higher) levels:  a single
credential cannot carry an appropriate semantic for dealing with multiple
levels of trust, secrecy, or security --- that's why single level
credentials are never used in defense organizations.

In our area, VWs perform transactions over a huge range of objects that have
highly diverse sensitivities, ranging from no sensitivity at all up to
(presumably) the highest levels of sensitivity demanded by business, finance
and government.  To try to encapsulate this in a single trust agreement
between interoperating worlds just doesn't make sense.

Different levels of trust actually cost different amounts of money to
implement if they are to be meaningful, so you cannot have a blanket trust
agreement that operates at all sensitivity levels unless you place a
prohibitively high bar on entry.  And if you don't mandate this high bar,
then the whole agreement becomes "best effort only" and so you end up with
the "security theater <http://en.wikipedia.org/wiki/Security_theater>" that
I mentioned in John's quote in the context of Internet-size scaling.

In view of the above two problems with trust agreements and also Jason's
point, I believe that trust agreements don't actually have a useful role to
play in VWs at all.  Instead, I suggest that the machinery that was going to
underpin trust agreements be used only for endpoint identification in the
usual way, with no trust implied.  It then becomes a *local policy
decision*which data to release to the peer, and that policy decision
will need to be
made on the basis of concrete realities rather than based on the wishful
thinking of a trust agreement.  While we are not concerned with local policy
decisions in MMOX, I think it's fair to suggest that most such decisions
should err on the side of caution.

The above picture would not be complete without offering a solution for
those who *do* require sensitive data to be made available to parties in
remote worlds, as will be common in business.  Because trust between worlds
is largely meaningless yet secure object transfer is still needed, I suggest
that one of the many well-designed cryptographic technologies be used to
deliver individually encrypted items to their intended parties directly.
Whether or not a MMOX protocol should assist in the transport of such opaque
items between worlds is an interesting topic for discussion.  This is
probably appropriate material for the same design team that will deal with
VW privacy and end-to-end encrypted communications to consider.

(PS. For the benefit of those who do not work in this area, please note that
what's become known as "DRM" is not correct usage of cryptography and should
not be used where real security is required.)


Morgaine.







On Thu, Apr 2, 2009 at 12:53 AM, Meadhbh Hamrick (Infinity) <
infinity@lindenlab.com>; wrote:

>
> On Apr 1, 2009, at 1:56 PM, Hurliman, John wrote:
>
>  A few days ago I posted an e-mail highlighting my concerns with the
>> architecture of OGP. I'm not sure if there was an implicit agreement from
>> the OGP authors or if the e-mail was lost in the flood. I'm reposting in a
>> new thread because I want to make sure I have a proper understanding of the
>> architecture.
>>
>>
>>  *       Indirectly, it highlights that the Agent Domain model does not
>>> have a solution to the problem of accessing worlds with which there is
>>> no trust agreement.  People will want to enter arbitrary worlds, and
>>> therefore that restriction is inadequate.
>>>
>>
> i would guess the solution would be to have a promiscuous agent domain that
> has a "i will trust all worlds" settings. i think this is a limitation of
> the implementation, not the architecture.
>
>  *       There will be millions of worlds in an Internet-scale metaverse,
>>> which makes the concept of interop through trust agreements far too
>>> narrow.  Trust loses its meaning entirely when scaled to millions,
>>> becoming mere paperwork or "security theater".
>>>
>>
> +1. what's your suggestion?
>
>
>
>> This is, in my opinion, the fundamental flaw in OGP. Explicit trust maps
>> (whitelists) work great when IBM wants to define policy to connect to the
>> Linden Lab grid, but has no meaning and no hope of scaling when you talk
>> about defining trust for millions of simulation grids and millions (or at
>> least thousands) of identity providers. This is the primary reason that
>> Intel and many members of the OpenSimulator/OpenMetaverse community have not
>> considered OGP as a strong proposal for virtual world interoperability. If
>> this understanding is not accurate, it would be helpful if an OGP author
>> could step in and clear up the confusion.
>>
>> John
>> _______________________________________________
>> mmox mailing list
>> mmox@ietf.org
>> https://www.ietf.org/mailman/listinfo/mmox
>>
>
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