W3C home > Mailing lists > Public > public-credentials@w3.org > June 2020

Re: New Work Item Proposal: Revocation List 2020

From: Mike Lodder <mike@sovrin.org>
Date: Fri, 5 Jun 2020 12:13:06 -0600
Message-ID: <CAPhnkk7PWgHwjX9UmODBrx779Ezez6JUFJpkB4Jw6TDiF0FBDA@mail.gmail.com>
To: Manu Sporny <msporny@digitalbazaar.com>
Cc: "W3C Credentials CG (Public List)" <public-credentials@w3.org>
FYI.

In looking at ISO /IEC 20008 and ISO 20009 which are used in government
agencies, BBS+ is an approved algorithm due to its use in EPID. Both were
formalized years ago.
This just goes to show that BBS+ is already being used by gov't and may not
be as big of a blocker as supposed.
EPID is already deployed in many Intel chips and is approved in the TPM 2.0
spec.
Hope that helps with adoption barries.


On Sat, May 16, 2020 at 9:50 AM Manu Sporny <msporny@digitalbazaar.com>
wrote:

> On 5/13/20 12:53 PM, Nikos Fotiou wrote:
> > Each CA maintains a different revocation bitvector per date. Each
> > certificate belongs to the bitvector that corresponds to the
> > certificate's expiration date. So suppose that a CA has generated 1K
> > certificates that expire the same date, a client that wishes to
> > verify the status of one of them will download in the worst case 1K
> > bits.
>
> Yes, I understood that... and that is useful... but it's not new nor is
> it novel. There is prior art going back multiple decades covering
> exactly what the paper you linked to is covering. I expect that no one
> did a prior art search on the paper and it slipped through the academic
> rigour firewall as a result. It happens.
>
> I hesitate to post this to the mailing list, but will do so with the
> following disclaimer.
>
> DO NOT POST LINKS TO PATENTS TO THIS MAILING LIST, EVER.
>
> There were a flurry of patents filed on this concept in the late 1990s
> and early 2000s... all of them abandoned, because, well, the concept was
> unpatentable. If you do a patent search, which you absolutely should not
> do if you work for a corporation in the US (your legal counsel should do
> it for you), you will find that there is a graveyard of abandoned patent
> applications related to peer to peer networks and CRL bitvectors.
>
> The paper you pointed to is a great idea... documenting a concept
> discovered 20-30 years prior to the publication of the paper. :)
>
> Even further, 20-30 years is being generous... here's the operating
> manual for the ENIAC, the first electronic general-purpose digital
> computer (circa 1945):
>
>
> http://www.bitsavers.org/pdf/univOfPennsylvania/eniac/ENIAC_Operating_Manual_Jun46.pdf
>
> Documentation for testing the accumulators are on page 7. There are
> punch card programs going back to the same years where the accumulators
> were used to express mathematical membership in a set, where the bit was
> active (1) if the item was in the set and inactive (0) when the item
> wasn't in the set.
>
> Same concept as the Revocation List 2020... from 65 years in the past.
>
> What was old is new again. :)
>
> -- manu
>
> --
> Manu Sporny - https://www.linkedin.com/in/manusporny/
> Founder/CEO - Digital Bazaar, Inc.
> blog: Veres One Decentralized Identifier Blockchain Launches
> https://tinyurl.com/veres-one-launches
>
>

-- 
Mike Lodder
Security Maven
Received on Friday, 5 June 2020 18:13:30 UTC

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