Overview[1]#

Verifiable Claims (W3C) is a group focusing on standardizing a number of signed claims or assertions regarding a person, entity or thing.

Verifiable Claims is an Architecture and not a specific Design or Implementation

Verifiable Claims is a draft specification proposes a data model for claims about entities having to do with identity profiles. A claim in the Verifiable Claims system has these elements:

• Issuer - The entity that creates the claim
• Subject - the entity named in a claim
• Inspector-verifier - the entity who can perform Validation of the claim
• Holder - Identity Provider (IDP) or the entity who controls a claim, which may or may not be the subject entity stated in the claim
• Context - A mapping to a globally defined semantic in a machine-readable data format
• Identifier registry - Mediates the creation and verification of subject identifiers. Examples of identifier registries include corporate LDAP or employee databases, Government Data Stores, and Distributed Ledger Technology.

The proposed charter states: “It is currently difficult to express banking account information, education qualifications, healthcare data, and other sorts of machine-readable personal information that has been verified by a 3rd party on the Web.”

The specification discusses self-sovereignty briefly but does not provide a solution for this element at this time. The Verifiable Claims architecture document calls for a registry of globally unique identifiers but the specification does not provide a solution for this element at this time.

There is discussion ongoing in the Verifiable Claims community about a formal role for Linked Data.

A "Verifiable Claims" is a trusted assertion an issuer makes about an subject to an Inspector-verifier who is authorized to request such n. More specifically, it is machine-readable statement made by an entity that is Cryptographically authentic (non-Repudiation). A "credential" (aka attestation) is defined to be a set of Verifiable Claimss that refer to a qualification, achievement, personal quality, aspect of an subject such as a name, Government Identity, preferred Payment Processor, home address, or university degree typically used to indicate suitability. The VCWG was established on the notion that there is currently no widely used User-centric standard for expressing and transacting Verifiable Claims via the Web. As such the aspects to be standardized by the VCWG are the set of Verifiable Claims that consists of the Subject Identifier, the Claims (about the subject), and the Claims Set Metadata. All claims are digitally signed by its issuer. The architecture of the proposed Verifiable Claims ecosystem follows that of the classic “four-corners” model used in the Payment Card industry.

• An Issuer entity creates a signed claim about a Subject, that is then provided to
• a Holder entity (which could be the subject itself).
• The entity that seeks to obtain assurances (regarding a Subject) is referred to as the Inspector-verifier.
• The Holder presents claims to the Inspector-verifier who has the option to validate its correct ownership against an Identifier registry. This registry maintains the set of recognized identifiers in the Architecture.

Data Provenance#

Verifiable Claims is essentially a method to relay information on Data Provenance

More Information#

There might be more information for this subject on one of the following:

• Claim
• Holder
• Hyperledger Indy
• Identifier registry
• Inspector-verifier
• Issuer
• JSON-LD
• JSON-LD Examples
• Self-Sovereign Identity
• Subject
• UPort
• Web Blog_blogentry_140417_1
• Web Blog_blogentry_281018_1

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• [#1] - BSC-DG Report (Draft) - based on information obtained 2017-04-14-
• [#2] - Verifiable Claims Data Model and Representations - based on information obtained 2018-10-14-