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[MINUTES] W3C Credentials CG Call - 2017-06-27 12pm ET

From: <msporny@digitalbazaar.com>
Date: Tue, 27 Jun 2017 16:59:06 -0400
Message-Id: <1498597146541.0.27740@zoe>
To: Credentials CG <public-credentials@w3.org>
Thanks to Ryan Grant for scribing this week! The minutes
for this week's Credentials CG telecon are now available:


Full text of the discussion follows for W3C archival purposes.
Audio from the meeting is available as well (link provided below).

Credentials CG Telecon Minutes for 2017-06-27

  1. Introductions
  2. Selective Disclosure and CL Signatures
  Kim Hamilton Duffy and Christopher Allen
  Ryan Grant
  Ryan Grant, Christopher Allen, Moses Ma, Glen Braun, Rutu 
  Mulkar-Mehta, Drummond Reed, Kim Hamilton Duffy, Jan Camenisch, 
  Dave Longley, Manu Sporny, Dan Burnett, Adam Lake, David I. Lehn, 
  Joe Andrieu, Nathan George, Adam Migus, Frederico Sportini

Ryan Grant is scribing.
Christopher Allen: Welcome to the joint Credentials CG and Data 
  Verification CG — Today's agenda: 
Christopher Allen:  Main topic will be selective disclosure

Topic: Introductions

Moses Ma:  What is the connection between protocol cookies and 
  learning using ML techniques?
Glen Braun:  Introduction: based in Seattle with a blockchain 
  company.  identity, verification.  using Solidity.  looking for 
  directions for spec.
Rutu Mulkar-Mehta:  My name is Dr. Rutu Mulkar-Mehta a professor 
  at Northeastern University, Seattle Branch interested in 
  Artificial Intelligence and Blockchain. I also have a company 
  Ticary Solutions interested in this space. Moses invited me to 
  participate in this group.
Christopher Allen: We have an active naming poll going on here: 
Christopher Allen:  Reminder of work prioritization poll, please 
  fill that out: https://goo.gl/sNs2vl
Christopher Allen:  Other action items: naming and mission 
Christopher Allen:  No meeting next week.  next is July 11th
Christopher Allen: Next meeting on 11 July - Attempt to close on 
  a formal proposal name & mission.
Drummond Reed: I won't be able to attend the July 11 meeting -- 
  must be at DHS Cybersecurity Showcase event in DC to report on 
  our DKMS (Decentralized Key Management System) work
Christopher Allen:  Hackathon for did:btcr!  (contact ChrisopherA 
  or kimhd)
Kim Hamilton Duffy: Jan's slides: https://goo.gl/E7anK6
Christopher Allen: Data Minimization and Selective Disclosure 
Christopher Allen:  Intent is to define, distinguish between 
Christopher Allen: https://w3c-dvcg.github.io/lds-redaction2016/
Christopher Allen:  There are two proposals...
Christopher Allen: 
Jan Camenisch: Related link: https://abc4trust.eu where we have 
  done a lot of the work to be discussed today
Moses Ma: To: rgrant - about the connection between protocol 
  cookies and learning using ML techniques - not sure yet, I just 
  know there's a pony in here somewhere... haha
Rutu Mulkar-Mehta: Ny Name and Affiliation: Dr. Rutu 
  Mulkar-Mehta,  linkedin - https://www.linkedin.com/in/rutumulkar/
Drummond Reed: Great work - ABC4Trust
Dave Longley: "Liz-ann-skee-uh"
Christopher Allen: https://goo.gl/E7anK6

Topic: Selective Disclosure and CL Signatures

Jan Camenisch:  19 Years at IBM, crypto for longer.  EU-funded 
  large collaborative projects.
Jan Camenisch:  Building a full middleware stack, running 
  technology pilots at e.g. a Greek school
Jan Camenisch:  Students able to critique course using proven 
  identity with security from reprisal
Jan Camenisch:  TPM work
Moses Ma:  Selective disclosure search
Christopher Allen: Slides: https://goo.gl/E7anK6
Jan Camenisch:  Not sure about audience, but here goes - high 
  level first, not crypto level.
Christopher Allen: ABC for Trust: https://abc4trust.eu/
Jan Camenisch:  Focusing today  on authentication
  ...discussing scenario on slide 7
  ...a major split in techniques is whether the issuer must be 
  online at the time of VC use
  ...review of scenario
Moses Ma: Yes, we've been calling it "partial transparency 
  search" or "transactionalized search" - a simple example is a 
  movie screenwriter provides and selective disclosure about their 
  new screenplay about a certain subject, but only producers who 
  have actually made a movie can see the abstract, and if it's 
  Spielberg searching, more info. Those willing to sign an NDA 
  smart contract can get more info automatically. Essentially, we'd 
  be disintermediating talent agencies.
Jan Camenisch:  Moving to slide 9, we see offline scenario
  ...we only need to disclose the information for the question at 
Jan Camenisch:  Discussion of blockchain and crypto options
Christopher Allen:  Value here is description of working systems.
Manu Sporny:  There is overlap in formalizing this work in the 
  W3C setting.  we don't have capability for VC and 
  psudonymous-sigs outside of test settings.  are there any patent 
Jan Camenisch:  Unclear what steps are
Christopher Allen:  Mentions potential for real-world deployments
Jan Camenisch:  IBM has no patents on the basic algorithms, but 
  other parties do have some patents.  IANAL.
Jan Camenisch:  What is identity?  we all have many.
  ...identity is the attributes I'm using now
  ...identities can be conflicting views
Jan Camenisch:  What does identity need?  attributes.  
  authentication method.  transport.  presentation policy (slide 
Jan Camenisch:  Some credentials are bound to a key, and require 
  proof of control
  ...anything not key-bound is shareable, but you can't be sure 
  that the person presenting that attribute is not spoofing
  ...the handles are pseudonyms
  ...(slide 17) there are domain specific pseudonyms
  ...(slide 19) "Credential Specification" is the set of known 
Drummond Reed: This is so good that I'd be happy to do Part 2 on 
  the next call if Jan is able.
Jan Camenisch:  Describing presentation
Christopher Allen:  Offering background of similar directions 
  from VC community
Christopher Allen:  Describes legal authority of working group
  ...this community has authority fro reports and recommendations
  ...describing crypto options that sometimes involve a 
  ...we'd love to have more advice from your team, especially in 
Jan Camenisch:  Possible directions include revocation
Manu Sporny:  Evernym and Digital Bazaar have strong interest in 
  this space, and Jan_Camenisch + team could add to strength of 
  specification with advice and multiple implementations
  ...clarification around crypto usage and data structures would 
  be a great area of involvement
Jan Camenisch:  Asks what status of VCs is
Dan Burnett: Sounds like a good discussion topic for next meeting
Dave Longley: +1 Next meeting
Christopher Allen: Next meeting is July 11th, but we need to 
  finalize on final name and mission statement.
Christopher Allen: So maybe later in July.
Dan Burnett: Next meeting == future meeting
Manu Sporny:  Describes "several months" of refinement
Christopher Allen:  Possible further work in revocation.  
  example: issuer of a verified claim is no longer live to clarify
Christopher Allen:  Are we using the right elliptic curves?  how 
  to steer around patents?
Dan Burnett: FYI for our visitors, the official term we use is 
  "verifiable claims", not "verified claims"
Dan Burnett: We don't assume that claims are already verified :)
Christopher Allen:  Navigates possible further topics with 
Christopher Allen:  Thanks everyone!  thanks Jan_Camenisch!  next 
  meeting July 11th.  adjourned.
Received on Tuesday, 27 June 2017 21:04:21 UTC

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