W3C home > Mailing lists > Public > public-credentials@w3.org > August 2019

Re: What’s after DIDs?

From: Christopher Lemmer Webber <cwebber@dustycloud.org>
Date: Thu, 08 Aug 2019 07:54:51 -0400
To: Brent Shambaugh <brent.shambaugh@gmail.com>
Cc: Credentials Community Group <public-credentials@w3.org>
Message-ID: <8736ib3m9g.fsf@dustycloud.org>
It isn't impossible (pigeonhole principle), but it is improbable.  I'll
point to this other stackexchange post:

  https://crypto.stackexchange.com/questions/47809/why-havent-any-sha-256-collisions-been-found-yet

Pretty much all of our cryptography relies on the statistical
improbability of collisions these days; Datashards is not unique there.
(Consider what happens when two keys match the same fingerprint, for
instance.)


Brent Shambaugh writes:

> Christopher, how do you make sure that the hash is unique?
>
> Doing my homework suggests it is possible that they are not unique, but it
> is improbable.
> https://crypto.stackexchange.com/questions/58214/how-can-hashes-be-unique-if-they-are-limited-in-number
>
> -Brent Shambaugh
>
> On Wed, Aug 7, 2019 at 1:36 PM Christopher Lemmer Webber <
> cwebber@dustycloud.org> wrote:
>
>> Manu Sporny writes:
>>
>> > On 7/29/19 1:35 PM, Joe Andrieu wrote:
>> >> TL;DR What’s after DIDs?
>> >
>> > From a technical standards perspective, these are currently pain points
>> > for Digital Bazaar and our customers that seem like we might be able to
>> > collaborate on with other developers / companies in this group:
>> >
>> > * True multi-DID interop
>> > * True multi-wallet/issuer/verifier interop
>> > * Collaboration on the Credential Handler API
>> > * Linked Data Proofs/Signatures (W3C WGs for these)
>> > * Secure Data Hubs (or, how do we make storage privacy-aware
>> >   and self-sovereign)
>>
>> And most importantly, having a universal URI that this is based on.
>>
>> I've made the case for this in Datashards:
>>
>>
>> https://github.com/WebOfTrustInfo/rwot9-prague/blob/master/topics-and-advance-readings/datashards-rationale.md
>>
>> I am making a strong assertion: a secure data hub is just *one* place
>> you can store your datashards (or whatever).  You should also be able to
>> share them over a direct web capability or stick them on a usb stick.
>> The URIs should all work the same.
>>
>> If we don't have a universal URI for it, we designed a broken system.
>>
>> Bombastically,
>>  - Chris
>>
>>
Received on Thursday, 8 August 2019 11:55:16 UTC

This archive was generated by hypermail 2.4.0 : Thursday, 24 March 2022 20:24:54 UTC