RE: ETSI TR 119 476 on selective disclosure

Hi Sam,

Thanks for your feedback! We’ll gather all kind of feedback on the technical report for a period of time, then present it to the ETSI management with the intention to get a work item to update the technical report accordingly.

Kind regards,
Sebastian

From: ProSapien Sam Smith <sam@prosapien.com>
Sent: Monday, 28 August 2023 22:07
To: Sebastian Elfors <sebastian.elfors@idnow.de>
Cc: public-vc-wg@w3.org
Subject: Re: ETSI TR 119 476 on selective disclosure

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Sebastian,

Thanks for the report.  I noticed that although you mention other draft standards for selective disclosure, such as the SD-JWT (SD-PWS), and the W3C-SD, your report does not mention the ACDC draft standard (Authentic chained data containers).

ACDCs are in production for the GLEIF vLEI.

[cid:image001.png@01D9DA5A.46240DA0]
Introducing the verifiable LEI (vLEI) - vLEI<https://www.gleif.org/en/vlei/introducing-the-verifiable-lei-vlei>
gleif.org<https://www.gleif.org/en/vlei/introducing-the-verifiable-lei-vlei>


https://www.gleif.org/vlei/introducing-the-verifiable-lei-vlei/gleif-ebook-the-vlei-introducing-digital-i-d-for-organizations-everywhere/01-06-2023-gleif_introduction-to-the-vlei_redesign_v2.2.pdf



For completeness, I suggest you also reference the SD mechanisms in ACDCs.

These are a variant of what you call hashes of salted attributes but include more nuanced mechanisms for different types of correlatability and unlinkability that are not in either the SD-JWT or W3C-SD  drafts. The original draft publication of the ACDC mechanisms pre-dates the other salted hashes.

The ACDC standard is being pursued under the ToIP foundation with the intent to promote it to a more recognized standards body such as IETF.



[cid:image002.png@01D9DA5A.46240DA0]
trustoverip/tswg-acdc-specification: Authentic Chained Data Containers (ACDC)<https://github.com/trustoverip/tswg-acdc-specification>
github.com<https://github.com/trustoverip/tswg-acdc-specification>

Authentic Chained Data Containers (ACDC)<https://www.ietf.org/archive/id/draft-ssmith-acdc-02.html>
ietf.org<https://www.ietf.org/archive/id/draft-ssmith-acdc-02.html>
[favicon.ico]<https://www.ietf.org/archive/id/draft-ssmith-acdc-02.html>



Happy to answer any questions



Sam


On Aug 28, 2023, at 05:47, Sebastian Elfors <sebastian.elfors@idnow.de<mailto:sebastian.elfors@idnow.de>> wrote:

All,

ETSI has now published the technical report TR 119 476 on selective disclosure<https://www.etsi.org/deliver/etsi_tr/119400_119499/119476/01.01.01_60/tr_119476v010101p.pdf>, which has been authored by me together with Peter Altmann (Swedish Agency for Digital Government). It provides a comprehensive overview of methods for selective disclosure in general, and an analysis of how these methods can be applied for the EUDI Wallet in particular. This could potentially be of interest to W3C VC WG and the related work on standards for ZKP and selective disclosure. Please let us know if you have any feedback or want to discuss this report at a meeting.

Kind regards,
Sebastian Elfors
Senior Architect

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