- From: Leah Houston, MD <leah@hpec.io>
- Date: Mon, 9 Aug 2021 11:32:52 -0400
- To: "Michael Herman (Trusted Digital Web)" <mwherman@parallelspace.net>
- Cc: Leonard Rosenthol <lrosenth@adobe.com>, "public-credentials@w3.org" <public-credentials@w3.org>
- Message-ID: <CAMWC-kiYSP04Kp6P0Z8Ee9F_4BQHnjyJnophwpYM4guKd+7Wsg@mail.gmail.com>
FYI We are doing a pilot project at the end of the month where we are deploying our credential issuing tech to issue digital Residency Certificates (permanent non-revocable) to Graduating Residents. We will include Schema in a CSV and PDF image upload and will include both (as necessary) Attached is a screenshot of our dashboard we plan to use. We'd appreciate any input or feedback, as I have followed this convo, and still see no agreement re standards, but we have to move forward... so we are. If anyone wants to help with this project re-schema and image standards for academic medical credentials please reach out, as building a user centric and interoperable system is important to us. Best Leah *Leah Houston M.D <https://twitter.com/LeahHoustonMD>.* Chief Executive Officer, HPEC www.hpec.io *H*umanitarian *P*hysicians *E*mpowerment *C*ommunity This electronic mail (including any attachments) may contain information that is privileged, confidential, and/or otherwise protected under applicable law from disclosure to anyone other than its intended recipient(s). Any dissemination or use of this electronic mail or its contents (including any attachments) by persons other than the intended recipient(s) is strictly prohibited. If you have received this message in error, please notify the sender or *webmaster@hpec.io <webmaster@hpec.io>* immediately and then delete the original message (including any attachments) in its entirety. We take steps to protect against viruses and other malicious code but advise you to carry out your own checks and precautions as we accept no liability for any which remain. We may monitor electronic mail sent to and from our server(s) to ensure regulatory compliance to protect our clients and business. On Mon, Aug 9, 2021 at 11:01 AM Michael Herman (Trusted Digital Web) < mwherman@parallelspace.net> wrote: > Thank you Leonard. > > > > *From:* Leonard Rosenthol <lrosenth@adobe.com> > *Sent:* August 9, 2021 8:43 AM > *To:* Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net>; > public-credentials@w3.org > *Subject:* Re: VC-if-eye a plain old .JPG file [was: Binding credentials > to publicly accessible repositories] > > > > Michael – I agree that if we were building a specific implementation that > could utilize a specific DLT-based approach, then I agree that one might > design a system like what you suggest. But as I mentioned, we are building > an open international standard that needs to support both online and > offline operations (hence the requirements to support embedding, though it > is not required) and whose cloud storage usage (when used) could be > centralized, decentralized or (mostly likely) a combination of both running > on a variety of systems. > > > > As I mentioned, my organization (C2PA) is building an open international > standard for content provenance and attribution utilizing a variety of > technologies from the W3C (as well as the ISO and ETSI). When we publish > our first public draft of this work in the coming weeks, we would welcome > your (and everyone’s) input on our work, especially how we are utilizing > VC’s. > > > > Leonard > > > > *From: *Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net> > *Date: *Monday, August 9, 2021 at 9:13 AM > *To: *Leonard Rosenthol <lrosenth@adobe.com>, public-credentials@w3.org < > public-credentials@w3.org> > *Subject: *RE: VC-if-eye a plain old .JPG file [was: Binding credentials > to publicly accessible repositories] > > The largest difference that I see in the 2 approaches is that in the > baboon scenario, the VC is being embedded as an opaque blob and is not > easily/more difficult to view and/or process. > > > > Whereas in my horse bridle scenario where the Structured Credential is > clearly visible and IMO more easily processible (at least on the Trusted > Digital Web). I can easily affirm that the horse bridge .JPG file *is* an > actual VC (or at least a clearly decernable container for an actual VC). > > > > I believe what you’d like to capture is what we call in the seismic data > processing/well logging industry as the *Processing History* for a media > file? > > > > This is an orthogonal concept and easy to handle. A separate claim can be > added to the Claims component of the Structured Credential that defines the > operations and parameters of the immediately preceding workflow step that > produced the current image. All of the media inputs to this step by named > by their DIDs (dutifully recorded on a VDR and immediately retrievable by > calling upon each media inputs agent service endpoint). There is (with > this approach) no need to record and store the entire processing history > with each image/media asset – only the immediately processing step’s > actions and parameters. The previous workflow steps can be recursively > retrieved by going back to the VDR for each input asset and retrieving the > asset (and hence, its Structured Credential elements). This network > (graph) of interconnection and interrelationships is exactly what underpins > the Trusted Digital Web. > > > > Where can we go from here? > > > > *From:* Leonard Rosenthol <lrosenth@adobe.com> > *Sent:* August 9, 2021 6:43 AM > *To:* Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net>; > public-credentials@w3.org > *Subject:* Re: VC-if-eye a plain old .JPG file [was: Binding credentials > to publicly accessible repositories] > > > > Michael – Thanks for taking the time to experiment with this. You are > (for the most part) where we were two years ago when we first started down > the path towards architecting the technology behind the Content > Authenticity Initiative. Like you, we had hoped to be able to do > everything with XMP and VC. I found this old image from our original > prototype that should feel familiar 😉. > > > > [image: Timeline Description automatically generated with low confidence] > > > > While this method works, for the most part, for raster images with a > single claim/credential – it immediately breaks down in pretty much any > other workflow. Whether it is the image going through normal editing & > publishing flows (e.g. Camera->Photoshop->Twitter) or being used as an > ingredient in a multi-image combined scenario (e.g., placing one image into > another). And when you get to other asset types – video, documents, 3D, > etc. more and more problems ensue. Which is why we ended up having to > moving away from that approach. > > > > But at the end of the day, we are still using VC’s for what they were > intended to accomplish (identity and accomplishments) as part of our larger > attribution system. You can learn about it at > https://contentauthenticity.org/how-it-works > <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcontentauthenticity.org%2Fhow-it-works&data=04%7C01%7Clrosenth%40adobe.com%7C2a50308b508547ca090408d95b378965%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637641116372848733%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=K2f2YIR3yaxkXmATNzkr28Zeo8Vahf9mivTfCEudx3g%3D&reserved=0> > and keep an eye on https://c2pa.org > <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fc2pa.org%2F&data=04%7C01%7Clrosenth%40adobe.com%7C2a50308b508547ca090408d95b378965%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637641116372848733%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=ZI5RBLmXVzNRJ35aP%2FLuLyLfvtKRyvktMTAsft1hCKw%3D&reserved=0> > where we will be making more technical material available shortly. > > > > Leonard > > > > *From: *Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net> > *Date: *Monday, August 9, 2021 at 1:49 AM > *To: *Leonard Rosenthol <lrosenth@adobe.com>, public-credentials@w3.org < > public-credentials@w3.org> > *Subject: *VC-if-eye a plain old .JPG file [was: Binding credentials to > publicly accessible repositories] > > RE: There is no mechanism in XMP nor in most standard asset formats for > establishing a model for tamper evidence, such as Digital Signatures, > (H)MAC, etc > > > > Leonard here’s a counterexample. > > > > I’ve applied to the principles and data model for Structured Credentials ( > https://www.youtube.com/watch?v=FFv4WZ0p3aY&list=PLU-rWqHm5p45dzXF2LJZjuNVJrOUR6DaD&index=1 > <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DFFv4WZ0p3aY%26list%3DPLU-rWqHm5p45dzXF2LJZjuNVJrOUR6DaD%26index%3D1&data=04%7C01%7Clrosenth%40adobe.com%7C2a50308b508547ca090408d95b378965%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637641116372858692%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=ZeqXSed3ItGAhFTDjOBkbKYmyNqJuMGKGMHgo49XE%2BY%3D&reserved=0>) > to VC-if-eye a plain old .JPG file (a photo I took with my Pixel 4a phone). > > > > - Test1_original.jpg is the original, unmodified test copy of the photo > - Test1_ps1.txt is a script that uses exiftool.exe to add the > Structured Credential structures to the original test copy of the photo > …including the proof elements stored in the EnvelopeSeal structure. They > are stored as elements in the XMP Keyword Info property of the photo. > - Test1_xmp.png is a screen shot of the Structured Credential > structures embedded into the XMP Keyword Info properties of the photo. > > > > We now have a mechanism for a .JPG file (or any XMP compatible media file) > to serve as both a photo and a Verifiable Credential. We are now able to > VC-if-eye any XMP compatible media file. > > > > Any holes? > > > > Best regards, > > Michael Herman > > Far Left Self-Sovereignist > > > > Self-Sovereign Blockchain Architect > > Trusted Digital Web > > Hyperonomy Digital Identity Lab > > Parallelspace Corporation > > > > > > > > > > *From:* Leonard Rosenthol <lrosenth@adobe.com> > *Sent:* August 3, 2021 3:02 PM > *To:* Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net>; > public-credentials@w3.org > *Subject:* Re: Binding credentials to publicly accessible repositories > > > > There is no mechanism in XMP nor in most standard asset formats for > establishing a model for tamper evidence, such as Digital Signatures, > (H)MAC, etc. > > > > Leonard > > > > *From: *Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net> > *Date: *Tuesday, August 3, 2021 at 2:49 PM > *To: *public-credentials@w3.org <public-credentials@w3.org>, Leonard > Rosenthol <lrosenth@adobe.com> > *Subject: *Re: Binding credentials to publicly accessible repositories > > Leonard, how do you define "native tamper-evident system"? > > Get Outlook for Android > <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Faka.ms%2FAAb9ysg&data=04%7C01%7Clrosenth%40adobe.com%7C2a50308b508547ca090408d95b378965%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637641116372868642%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=NtjCD%2FY2i8nmS3qIeUd%2BOCJGYscswrndCMOGi07Lmec%3D&reserved=0> > > > ------------------------------ > > *From:* Leonard Rosenthol <lrosenth@adobe.com> > *Sent:* Tuesday, August 3, 2021 10:53:47 AM > *To:* Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net>; > public-credentials@w3.org <public-credentials@w3.org> > *Subject:* Re: Binding credentials to publicly accessible repositories > > > > Michael, thanks for the reference to XMP…but you are probably not aware > that I am the chair of ISO TC 171/SC 2/WG 12 where XMP is standardized * > *and** the project leader for XMP itself. (oh, and I am also the XMP > Architect internally to Adobe 😉 ). > > > > So yes, leveraging existing open standards such as XMP is indeed a key to > delivering on the promises mentioned below – but it can’t be the only > solution due to it being a text-based serialization (thus not lending > itself well to binary data structures) and not having a native > tamper-evident system. Additionally, while it is supported by most common > asset formats, it is not supported by all. > > > > Leonard > > > > *From: *Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net> > *Date: *Tuesday, August 3, 2021 at 10:43 AM > *To: *Leonard Rosenthol <lrosenth@adobe.com>, public-credentials@w3.org < > public-credentials@w3.org> > *Subject: *Re: Binding credentials to publicly accessible repositories > > Checkout https://en.wikipedia.org/wiki/Extensible_Metadata_Platform > <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FExtensible_Metadata_Platform&data=04%7C01%7Clrosenth%40adobe.com%7C2a50308b508547ca090408d95b378965%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637641116372868642%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=mjnMRpCaW3UDDt5k7arMOda2RQ7ilHo3XqnT6HqRe3M%3D&reserved=0> > > > > And here's a data model to consider for use in a custom XMP profile: > https://youtu.be/FFv4WZ0p3aY > <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fyoutu.be%2FFFv4WZ0p3aY&data=04%7C01%7Clrosenth%40adobe.com%7C2a50308b508547ca090408d95b378965%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637641116372878599%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=2HBjxv88yAecPVbTWbriqHVsECqlMYcMyktWDaBQgqY%3D&reserved=0> > > > > Get Outlook for Android > <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Faka.ms%2FAAb9ysg&data=04%7C01%7Clrosenth%40adobe.com%7C2a50308b508547ca090408d95b378965%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637641116372888559%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=xM2ypGIIon3QyVfkAgYcVwbFpLaF10riIs2dHfpHahk%3D&reserved=0> > ------------------------------ > > *From:* Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net> > *Sent:* Friday, July 30, 2021 1:25:18 PM > *To:* Leonard Rosenthol <lrosenth@adobe.com>; public-credentials@w3.org < > public-credentials@w3.org> > *Subject:* RE: Binding credentials to publicly accessible repositories > > > > So an alternate strategy to avoid embed an actual VC or otherwise try to > attach a VC to an asset is to use the metadata capabilities of each of > these formats to store the credential id, @context, vc type list, > credentialSubject id, the individual claims (name-value pairs), and the > proof elements > > > > …vc-if-eye each format using each format’s native metadata capabilities. > > > > *From:* Leonard Rosenthol <lrosenth@adobe.com> > *Sent:* July 30, 2021 1:03 PM > *To:* Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net>; > public-credentials@w3.org > *Subject:* Re: Binding credentials to publicly accessible repositories > > > > Michael – not sure you understand the scenario here. > > > > We aren’t building a specific system/solution for our own needs and those > of our customers – we are developing an open standard that associates > provenance with existing assets (eg. JPEG, PNG, MP4, PDF, etc.). Since > those are the formats that are recognized by systems (and regulatory > solutions) today, it would make no sense to start wrapping them in some > other format (be it JSON, XML, or whatever). JPEG files (for example) need > to work everywhere they do today – BUT contain tamper-evident provenance. > > > > Leonard > > > > *From: *Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net> > *Date: *Friday, July 30, 2021 at 2:46 PM > *To: *Leonard Rosenthol <lrosenth@adobe.com>, public-credentials@w3.org < > public-credentials@w3.org> > *Subject: *RE: Binding credentials to publicly accessible repositories > > It’s a SMOP (small matter of programming). Once upon a time, browers > weren’t capable of displaying a lot of different kinds of resources (e.g. > XML). > > > > Why not render your VCs as XML? > > …or consider using server-side rendering? > > …or write an in-browser renderer using WASM? > > > > *“The difficult we can do, the impossible takes us a little bit longer…” * > 😊 > > > > *From:* Leonard Rosenthol <lrosenth@adobe.com> > *Sent:* July 30, 2021 12:35 PM > *To:* Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net>; > public-credentials@w3.org > *Subject:* Re: Binding credentials to publicly accessible repositories > > > > Given that putting a “.vc” file on a website or in a Twitter feed of > YouTube channel isn’t going have it properly displayed – that’s not an > option, unfortunately, Michael. > > > > Leonard > > > > *From: *Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net> > *Date: *Friday, July 30, 2021 at 1:05 PM > *To: *Leonard Rosenthol <lrosenth@adobe.com>, public-credentials@w3.org < > public-credentials@w3.org> > *Subject: *RE: Binding credentials to publicly accessible repositories > > I suggest storing the “original version” of the artwork as a claim within > a signed credential …the credential wraps the artwork like a container or a > “frame”. > > > > I believe this is much better than trying to attach a credential to the > artwork. > > > > Best regards, > > Michael Herman > > Far Left Self-Sovereignist > > > > Self-Sovereign Blockchain Architect > > Trusted Digital Web > > Hyperonomy Digital Identity Lab > > Parallelspace Corporation > > > > > > > > > > *From:* Leonard Rosenthol <lrosenth@adobe.com> > *Sent:* July 30, 2021 10:31 AM > *To:* public-credentials@w3.org > *Subject:* Binding credentials to publicly accessible repositories > > > > I realize that I might be out on the bleeding edge a bit, though not > completely as I think it is very similar to what OpenBadges will face as > they move to VC’s… > > > > In the Trust Model section of the VC Data Model spec, it states that one > of aspects of that model is: > > The holder trusts the repository to store credentials securely, to not > release them to anyone other than the holder, and to not corrupt or lose > them while they are in its care. > > This is certainly true when the repository in question is something like a > wallet that is designed to be kept private or local (not shared). But what > happens when the repository is designed to be out in the public… such as an > image or PDF with the VC embedded? > > > > > > As part of the C2PA’s (https://c2pa.org > <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fc2pa.org%2F&data=04%7C01%7Clrosenth%40adobe.com%7C2a50308b508547ca090408d95b378965%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637641116372888559%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=cm14pE4lHoe0MceiFgzwgDmRXmM1yuA%2B0toRD%2BWIKyU%3D&reserved=0>) > work on establishing provenance for digital assets, we will be using VC’s > as a way for persons and organizations to establish their relationships to > the asset. Specifically in this instance, we’re extending schema.org’s > Person and Organization schemas, as used by their CreativeWork schema, to > support referencing a VC. This then allows the author or publisher (or any > of the other roles in CW) to provide their credentials in that role, which > (a) adds useful trust signal(s) to the end consumer and (b) helps establish > reputation. > > > > These VC’s (etc.) will be embedded into the assets (e.g., video, images, > documents, etc.) in a tamper-evident manner, so that in addition to the > individual VC’s “proof”, any attempt to change the CreativeWork > relationships, etc. can also be detected. This all works great. > > > > However, in doing some threat modelling, we recognized that we have no > protection against a malicious actor simply copying the VC from one asset > and dropping it into another (and then signing the new setup), because > there is nothing that binds the credential to the asset in our case. > > > > Has anyone run into this scenario before and has some guidance to offer? > Am I doing something that I shouldn’t be doing – and if so, what does that > mean for OpenBadges? > > > > All thoughts and suggestions welcome! > > > > Thanks, > > Leonard > > >
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Received on Monday, 9 August 2021 15:34:35 UTC