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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSON Web Signatures for Data Integrity Proofs</title>
<script src="https://www.w3.org/Tools/respec/respec-w3c" class="remove"></script>
<script class='remove'>
// See https://github.com/w3c/respec/wiki/ for how to configure ReSpec
var respecConfig = {
group: "vc",
// specification status (e.g., WD, NOTE, etc.). If in doubt use ED.
specStatus: "ED",
// the specification's short name, as in http://www.w3.org/TR/short-name/
shortName: "vc-jws-2020",
// if you wish the publication date to be other than today, set this
publishDate: "2023-05-05",
// implementationReportURI: "https://w3c.github.io/vc-test-suite/implementations/",
// errata: "https://w3c.github.io/vc-data-model/errata.html",
// previousMaturity: "REC",
// previousPublishDate: "2019-11-19",
// if there is a previously published draft, uncomment this and set its YYYY-MM-DD date
// and its maturity status
// previousPublishDate: "1977-03-15",
// previousMaturity: "WD",
// extend the bibliography entries
// localBiblio: vcwg.localBiblio,
doJsonLd: true,
// Uncomment these to use the respec extension that generates a list of
// normative statements:
// preProcess: [],
// postProcess: [],
github: "https://github.com/w3c/vc-jws-2020/",
includePermalinks: false,
// if there a publicly available Editor's Draft, this is the link
edDraftURI: "https://w3c.github.io/vc-jws-2020/",
// https://github.com/w3c/vc-jws-2020/pull/26#issuecomment-1297348484
// latestVersion: "https://www.w3.org/community/reports/credentials/CG-FINAL-lds-jws2020-20220721/",
// editors, add as many as you like
// only "name" is required
editors: [
{
name: "Orie Steele",
company: "Transmute",
companyURL: "https://transmute.industries/",
w3cid: 109171
},
{
name: "Michael Jones",
company: "Microsoft Corporation",
companyURL: "https://www.microsoft.com",
w3cid: 38745
},
],
// authors, add as many as you like.
// This is optional, uncomment if you have authors as well as editors.
// only "name" is required. Same format as editors.
authors:
[],
maxTocLevel: 2,
inlineCSS: true,
license: "w3c-software-doc",
localBiblio: {
ISO_8601: {
title: "ISO_8601",
href: "https://en.wikipedia.org/wiki/ISO_8601",
},
IANA_JOSE: {
title: "JOSE",
href: "https://www.iana.org/assignments/jose/jose.xhtml",
}
},
};
</script>
</head>
<body>
<section id="abstract">
<p>
This specification describes a JSON Web Signature Suite created in 2020
for the Verifiable Credentials Data Integrity Proof specification. The Signature Suite utilizes
Detached JWS signatures to provide support for a subset of the digital
signature algorithms registered with IANA.
</p>
</section>
<section id="sotd">
<p class="advisement">
This work item has been
<a href="https://www.w3.org/2021/Process-20211102/#discontinuedREC">discontinued</a>.
The working group recommends using <a href="https://www.w3.org/TR/vc-jwt">vc-jwt</a>
for securing verifiable credentials using JSON Web Signatures.
</p>
<p>
This document has been withdrawn due to resolutions from the working group, which can be reviewed here:
<a href="https://www.w3.org/2017/vc/WG/Meetings/Minutes/2022-09-15-vcwg#resolution1">
Abandon JWS2020 in favor of pointing to VC-JWT using the JWS 2020 Readme and text in VC-JWT.
</a>
</p>
</section>
<section>
<h2>Introduction</h2>
<p>
This specification defines a cryptographic suite for the purpose of
creating, verifying proofs for JSON Web Signatures in conformance with
the Data Integrity Proofs specification.
</p>
<p>
In general the suites uses the RDF Dataset Normalization Algorithm
to transform an input document into its canonical form.
The canonical representation is then hashed and signed
with a detached signature algorithm.
</p>
</section>
<section id="terminology">
<h2>Terminology</h2>
<p>
The following terms are used to describe concepts involved in the
generation and verification of the Linked Data Proof
<a>signature suite</a>.
</p>
<dl>
<dt><dfn>signature suite</dfn></dt>
<dd>
A specified set of cryptographic primitives typically consisting of a
canonicalization algorithm, a message digest algorithm, and a
signature algorithm that are bundled together by cryptographers for
developers for the purposes of safety and convenience.
</dd>
<dt><dfn>canonicalization algorithm</dfn></dt>
<dd>
An algorithm that takes an input document that has more than one
possible representation and always transforms it into a
<a>canonical form</a>. This process is sometimes also called
normalization.
</dd>
<dt>
<dfn data-lt="message digest algorithm | message digest algorithms"
>message digest algorithm</dfn
>
</dt>
<dd>
An algorithm that takes a message, preferably in some
<a>canonical form</a> and produces a cryptographic output called a
digest that is often many orders of magnitude smaller than the input
message. These algorithms are often 1) very fast, 2) non-reversible,
3) cause the output to change significantly when even one bit of the
input message changes, and 4) make it infeasible to find two different
inputs for the same output.
</dd>
<dt><dfn>canonical form</dfn></dt>
<dd>
The output of applying a <a>canonicalization algorithm</a> to an input
document.
</dd>
<dt><dfn>signature algorithm</dfn></dt>
<dd>
An algorithm that takes an input message and produces an output value
where the receiver of the message can mathematically verify that the
message has not been modified in transit and came from someone
possessing a particular secret.
</dd>
<dt>
<dfn data-lt="linked data document|linked data documents"
>linked data document</dfn
>
</dt>
<dd>A document comprised of linked data.</dd>
<dt>
<dfn data-lt="linked data proof|linked data proofs"
>linked data proof</dfn
>
</dt>
<dd>
A
<a
href="https://www.w3.org/TR/vc-data-integrity/#proofs"
class="externalDFN"
>proof</a
>
which is a set of attributes that represent a linked data digital
proof and the parameters required to verify it as defined by
RDF-N-Quads.
</dd>
<dt>linked data proof document</dt>
<dd>
A <a>linked data document</a> featuring one or more
<a>linked data proofs</a>.
</dd>
<dt><dfn>JsonWebKey2020</dfn></dt>
<dd>
The <code>type</code> of the verification method for the signature
suite <a>JsonWebSignature2020</a>.
</dd>
<dt><dfn>JsonWebSignature2020</dfn></dt>
<dd>
The <code>type</code> of the linked data proof for the signature suite
<a>JsonWebSignature2020</a>.
</dd>
</dl>
</section>
<section id="suite-definition">
<h2>Suite Definition</h2>
<p>
The JSON Web Signature <a>signature suite</a> 2020 MUST be used in
conjunction with the signing and verification algorithms in the Data
Integrity Proofs specification. The suite consists of the
following algorithms:
</p>
<table class="simple">
<thead>
<th>Parameter</th>
<th>Value</th>
<th>Specification</th>
</thead>
<tbody>
<tr>
<td><a>canonicalization algorithm</a></td>
<td>https://w3id.org/security#URDNA2015</td>
<td>TBD</td>
</tr>
<tr>
<td><a>message digest algorithm</a></td>
<td>SHA-256</td>
<td>[[RFC4634]]</td>
</tr>
<tr>
<td><a>signature algorithm</a></td>
<td>JSON Web Signature (JWS) Unencoded Payload Option</td>
<td>[[RFC7797]]</td>
</tr>
</tbody>
</table>
<section>
<h3>JOSE Conformance</h3>
<p>
This suite support cryptographic agility, see [[RFC7696]].
This table maps a key type to a subset of [[IANA_JOSE]] supported
signing and encryption algorithms.
</p>
<table class="simple">
<thead>
<th>kty</th>
<th>crvOrSize</th>
<th>signature</th>
<th>keyAgreement</th>
<th>encryption</th>
</thead>
<tbody>
<tr>
<td>OKP</td>
<td>Ed25519</td>
<td>EdDSA</td>
<td></td>
<td>ECDH-ES+A256KW</td>
</tr>
<tr>
<td>OKP</td>
<td>X25519</td>
<td></td>
<td>ECDH</td>
<td>ECDH-ES+A256KW</td>
</tr>
<tr>
<td>EC</td>
<td>secp256k1</td>
<td>ES256K</td>
<td>ECDH</td>
<td>ECDH-ES+A256KW</td>
</tr>
<tr>
<td>EC</td>
<td>P-256</td>
<td>ES256</td>
<td>ECDH</td>
<td>ECDH-ES+A256KW</td>
</tr>
<tr>
<td>EC</td>
<td>P-384</td>
<td>ES384</td>
<td>ECDH</td>
<td>ECDH-ES+A256KW</td>
</tr>
<tr>
<td>RSA</td>
<td>2048+</td>
<td>PS256</td>
<td></td>
<td>RSA-OAEP</td>
</tr>
</tbody>
</table>
</section>
<section>
<h2>Verification Method</h2>
<p>
The cryptographic material used to verify a linked data proof is
called the verification method.
</p>
<p>
This suite relies on public key material represented using
[[RFC7517]].
</p>
<p>
This suite supports public key use for both digital signature
verification, according to [[RFC7515]], and key agreement according to
[[RFC8037]].
</p>
<p>
This suite MAY be used to verify linked data proofs produced by key
material in any representation that can be converted to JWK, however
it is RECOMMENDED that this suite be used with verification method's
of type <a>JsonWebKey2020</a>.
</p>
<section>
<h3>JSON Web Key 2020</h3>
<p>
The <code>id</code> of the verification method SHOULD be the JWK
thumbprint calculated from the <code>publicKeyJwk</code> property
value according to [[RFC7638]].
</p>
<p>
The <code>type</code> of the verification method SHOULD be
<a>JsonWebKey2020</a>.
</p>
<p>
The <code>controller</code> of the verification method SHOULD be a
URI.
</p>
<p>
The <code>publicKeyJwk</code> property of the verification method
SHOULD be a JWK formatted according to [[RFC7517]].
</p>
<p class="advisement">
Be careful not to accidentally publish the JWK representation of a
private key. See
<a href="https://tools.ietf.org/html/rfc7517#appendix-A.2"
>rfc7517#appendix-A.2</a
>
for examples of private key representations. The property
<code>publicKeyJwk</code> MUST never contain <code>"d"</code>.
</p>
<pre class="example">
{
"id": "https://example.com/issuer/123#ovsDKYBjFemIy8DVhc-w2LSi8CvXMw2AYDzHj04yxkc",
"type": "JsonWebKey2020",
"controller": "https://example.com/issuer/123",
"publicKeyJwk": {
"kty": "OKP",
"crv": "Ed25519",
"x": "CV-aGlld3nVdgnhoZK0D36Wk-9aIMlZjZOK2XhPMnkQ"
}
}
</pre>
<pre class="example" title="Example in DID Document.">
{
"@context": ["https://www.w3.org/ns/did/v1", "https://w3id.org/security/suites/jws-2020/v1"],
"id": "did:example:123",
"verificationMethod": [
{
"id": "did:example:123#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A",
"type": "JsonWebKey2020",
"controller": "did:example:123",
"publicKeyJwk": {
"kty": "OKP",
"crv": "Ed25519",
"x": "VCpo2LMLhn6iWku8MKvSLg2ZAoC-nlOyPVQaO3FxVeQ"
}
},
{
"id": "did:example:123#4SZ-StXrp5Yd4_4rxHVTCYTHyt4zyPfN1fIuYsm6k3A",
"type": "JsonWebKey2020",
"controller": "did:example:123",
"publicKeyJwk": {
"kty": "EC",
"crv": "secp256k1",
"x": "Z4Y3NNOxv0J6tCgqOBFnHnaZhJF6LdulT7z8A-2D5_8",
"y": "i5a2NtJoUKXkLm6q8nOEu9WOkso1Ag6FTUT6k_LMnGk"
}
},
{
"id": "did:example:123#n4cQ-I_WkHMcwXBJa7IHkYu8CMfdNcZKnKsOrnHLpFs",
"type": "JsonWebKey2020",
"controller": "did:example:123",
"publicKeyJwk": {
"kty": "RSA",
"e": "AQAB",
"n": "omwsC1AqEk6whvxyOltCFWheSQvv1MExu5RLCMT4jVk9khJKv8JeMXWe3bWHatjPskdf2dlaGkW5QjtOnUKL742mvr4tCldKS3ULIaT1hJInMHHxj2gcubO6eEegACQ4QSu9LO0H-LM_L3DsRABB7Qja8HecpyuspW1Tu_DbqxcSnwendamwL52V17eKhlO4uXwv2HFlxufFHM0KmCJujIKyAxjD_m3q__IiHUVHD1tDIEvLPhG9Azsn3j95d-saIgZzPLhQFiKluGvsjrSkYU5pXVWIsV-B2jtLeeLC14XcYxWDUJ0qVopxkBvdlERcNtgF4dvW4X00EHj4vCljFw"
}
},
{
"id": "did:example:123#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw",
"type": "JsonWebKey2020",
"controller": "did:example:123",
"publicKeyJwk": {
"kty": "EC",
"crv": "P-256",
"x": "38M1FDts7Oea7urmseiugGW7tWc3mLpJh6rKe7xINZ8",
"y": "nDQW6XZ7b_u2Sy9slofYLlG03sOEoug3I0aAPQ0exs4"
}
},
{
"id": "did:example:123#8wgRfY3sWmzoeAL-78-oALNvNj67ZlQxd1ss_NX1hZY",
"type": "JsonWebKey2020",
"controller": "did:example:123",
"publicKeyJwk": {
"kty": "EC",
"crv": "P-384",
"x": "GnLl6mDti7a2VUIZP5w6pcRX8q5nvEIgB3Q_5RI2p9F_QVsaAlDN7IG68Jn0dS_F",
"y": "jq4QoAHKiIzezDp88s_cxSPXtuXYFliuCGndgU4Qp8l91xzD1spCmFIzQgVjqvcP"
}
},
{
"id": "did:example:123#NjQ6Y_ZMj6IUK_XkgCDwtKHlNTUTVjEYOWZtxhp1n-E",
"type": "JsonWebKey2020",
"controller": "did:example:123",
"publicKeyJwk": {
"kty": "EC",
"crv": "P-521",
"x": "AVlZG23LyXYwlbjbGPMxZbHmJpDSu-IvpuKigEN2pzgWtSo--Rwd-n78nrWnZzeDc187Ln3qHlw5LRGrX4qgLQ-y",
"y": "ANIbFeRdPHf1WYMCUjcPz-ZhecZFybOqLIJjVOlLETH7uPlyG0gEoMWnIZXhQVypPy_HtUiUzdnSEPAylYhHBTX2"
}
}
],
"authentication": [
"did:example:123#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A",
"did:example:123#4SZ-StXrp5Yd4_4rxHVTCYTHyt4zyPfN1fIuYsm6k3A",
"did:example:123#n4cQ-I_WkHMcwXBJa7IHkYu8CMfdNcZKnKsOrnHLpFs",
"did:example:123#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw",
"did:example:123#8wgRfY3sWmzoeAL-78-oALNvNj67ZlQxd1ss_NX1hZY",
"did:example:123#NjQ6Y_ZMj6IUK_XkgCDwtKHlNTUTVjEYOWZtxhp1n-E"
],
"assertionMethod": [
"did:example:123#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A",
"did:example:123#4SZ-StXrp5Yd4_4rxHVTCYTHyt4zyPfN1fIuYsm6k3A",
"did:example:123#n4cQ-I_WkHMcwXBJa7IHkYu8CMfdNcZKnKsOrnHLpFs",
"did:example:123#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw",
"did:example:123#8wgRfY3sWmzoeAL-78-oALNvNj67ZlQxd1ss_NX1hZY",
"did:example:123#NjQ6Y_ZMj6IUK_XkgCDwtKHlNTUTVjEYOWZtxhp1n-E"
],
"capabilityDelegation": [
"did:example:123#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A",
"did:example:123#4SZ-StXrp5Yd4_4rxHVTCYTHyt4zyPfN1fIuYsm6k3A",
"did:example:123#n4cQ-I_WkHMcwXBJa7IHkYu8CMfdNcZKnKsOrnHLpFs",
"did:example:123#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw",
"did:example:123#8wgRfY3sWmzoeAL-78-oALNvNj67ZlQxd1ss_NX1hZY",
"did:example:123#NjQ6Y_ZMj6IUK_XkgCDwtKHlNTUTVjEYOWZtxhp1n-E"
],
"capabilityInvocation": [
"did:example:123#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A",
"did:example:123#4SZ-StXrp5Yd4_4rxHVTCYTHyt4zyPfN1fIuYsm6k3A",
"did:example:123#n4cQ-I_WkHMcwXBJa7IHkYu8CMfdNcZKnKsOrnHLpFs",
"did:example:123#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw",
"did:example:123#8wgRfY3sWmzoeAL-78-oALNvNj67ZlQxd1ss_NX1hZY",
"did:example:123#NjQ6Y_ZMj6IUK_XkgCDwtKHlNTUTVjEYOWZtxhp1n-E"
]
}
</pre>
</section>
</section>
<section>
<h2>Proof Representation</h2>
<p>
The cryptographic material used to represent a linked data proof is
called the proof type.
</p>
<p>
This suite relies on detached digital signatures represented using
[[RFC7797]].
</p>
<section>
<h3>JSON Web Signature 2020</h3>
<p>
The <code>verificationMethod</code> property of the proof SHOULD be
a URI. Dereferencing the <code>verificationMethod</code> SHOULD
result in an object of <code>type</code> <a>JsonWebKey2020</a>.
</p>
<p>
The <code>type</code> property of the proof MUST be
<a>JsonWebSignature2020</a>.
</p>
<p>
The <code>created</code> property of the proof MUST be an
[[ISO_8601]] formatted date string.
</p>
<p>
The <code>proofPurpose</code> property of the proof MUST be a
string, and SHOULD match the verification relationship expressed by
the verification method <code>controller</code>.
</p>
<p>
The <code>jws</code> property of the proof MUST be a detached JWS
produced according to [[RFC7797]].
<p class="advisement">
The header of the detached JWS MUST look like this:
<code>{"b64":false,"crit":["b64"],"alg":"PS256"}</code>
where <code>alg</code> is a value registered in [[IANA_JOSE]]
AND is present in the supported algorithms table of this suite.
</p>
</p>
</section>
</section>
</section>
<section>
<h2>Test Vectors</h2>
<p>The following test vectors are provided to assist with implementers.</p>
<pre class="example">
{
"seed_0": "9b937b81322d816cfab9d5a3baacc9b2a5febe4b149f126b3630f93a29527017"
}
</pre>
<pre class="example">
{
"keypair_0": {
"id": "#ovsDKYBjFemIy8DVhc-w2LSi8CvXMw2AYDzHj04yxkc",
"type": "JsonWebKey2020",
"controller": "did:key:z6Mkf5rGMoatrSj1f4CyvuHBeXJELe9RPdzo2PKGNCKVtZxP",
"publicKeyJwk": {
"kty": "OKP",
"crv": "Ed25519",
"x": "CV-aGlld3nVdgnhoZK0D36Wk-9aIMlZjZOK2XhPMnkQ"
},
"privateKeyJwk": {
"kty": "OKP",
"crv": "Ed25519",
"x": "CV-aGlld3nVdgnhoZK0D36Wk-9aIMlZjZOK2XhPMnkQ",
"d": "m5N7gTItgWz6udWjuqzJsqX-vksUnxJrNjD5OilScBc"
}
},
"keypair_1": {
"id": "#zaS0k3zk2KpT4NqqpdUA1YD0JVTOtQf3pNoKDI-wes0",
"type": "JsonWebKey2020",
"controller": "did:key:zQ3shP2mWsZYWgvgM11nenXRTx9L1yiJKmkf9dfX7NaMKb1pX",
"publicKeyJwk": {
"kty": "EC",
"crv": "secp256k1",
"x": "GBMxavme-AfIVDKqI6WBJ4V5wZItsxJ9muhxPByllHQ",
"y": "SChlfVBhTXG_sRGc9ZdFeCYzI3Kbph3ivE12OFVk4jo"
},
"privateKeyJwk": {
"kty": "EC",
"crv": "secp256k1",
"x": "GBMxavme-AfIVDKqI6WBJ4V5wZItsxJ9muhxPByllHQ",
"y": "SChlfVBhTXG_sRGc9ZdFeCYzI3Kbph3ivE12OFVk4jo",
"d": "m5N7gTItgWz6udWjuqzJsqX-vksUnxJrNjD5OilScBc"
}
},
"keypair_2": {
"id": "#zwlFQYyCqQXZ3nzpxkxJFxlpGU2l8LZQ9gxIxDdEhuY",
"type": "JsonWebKey2020",
"controller": "did:key:zUewtYk1yGS3SWp7kxrFK3DZRHMFbGEnrgFrqsi6hG8Z7EpRzbMP7d5y49HhrUv4tgV4DHCSoQUtF1NRNe43bymdi7K91PkwEGJRR4jv4Vb2mu2ZcBJXbw3d35JfqsVeLcwXFUi",
"publicKeyJwk": {
"kty": "EC",
"crv": "P-384",
"x": "eQbMauiHc9HuiqXT894gW5XTCrOpeY8cjLXAckfRtdVBLzVHKaiXAAxBFeVrSB75",
"y": "YOjxhMkdH9QnNmGCGuGXJrjAtk8CQ1kTmEEi9cg2R9ge-zh8SFT1Xu6awoUjK5Bv"
},
"privateKeyJwk": {
"kty": "EC",
"crv": "P-384",
"x": "eQbMauiHc9HuiqXT894gW5XTCrOpeY8cjLXAckfRtdVBLzVHKaiXAAxBFeVrSB75",
"y": "YOjxhMkdH9QnNmGCGuGXJrjAtk8CQ1kTmEEi9cg2R9ge-zh8SFT1Xu6awoUjK5Bv",
"d": "dXghMAzYZmv46SNRuxmfDIuAlv7XIhvlkPzW3vXsopB1ihWp47tx0hqjZmYO6fJa"
}
}
}
</pre>
<pre class="example">
{
"message_0": "hello world"
}
</pre>
<pre class="example">
{
"signature_0": "eyJhbGciOiJFZERTQSIsImI2NCI6ZmFsc2UsImNyaXQiOlsiYjY0Il19..v_Tni1_9lPQsS52GOnCMTFp7vDRjZIcj3pmuY1mF9W7nMAH94DpGecNwdFsXrz09n9bDTd8gJFqXWZeWIGvUAA",
"signature_1": "eyJhbGciOiJFUzI1NksiLCJiNjQiOmZhbHNlLCJjcml0IjpbImI2NCJdfQ..dsgrLHXb5-VsUKVop4JJyO9dkFvJKRVNeOcEDD9nBAl3MqzJrJYfEfL8wArG-9ZjL12UD8btrJljZ7_C8p51mA"
}
</pre>
<pre class="example">
{
"issuer_0": {
"@context": [
"https://www.w3.org/ns/did/v1",
"https://w3id.org/security/suites/jws-2020/v1",
{
"@base": "https://example.com/issuer/123"
}
],
"id": "https://example.com/issuer/123",
"verificationMethod": [
{
"id": "#ovsDKYBjFemIy8DVhc-w2LSi8CvXMw2AYDzHj04yxkc",
"type": "JsonWebKey2020",
"controller": "https://example.com/issuer/123",
"publicKeyJwk": {
"kty": "OKP",
"crv": "Ed25519",
"x": "CV-aGlld3nVdgnhoZK0D36Wk-9aIMlZjZOK2XhPMnkQ"
}
}
],
"assertionMethod": ["#ovsDKYBjFemIy8DVhc-w2LSi8CvXMw2AYDzHj04yxkc"]
}
}
</pre>
<pre class="example">
{
"vc_template_0": {
"@context": [
"https://www.w3.org/2018/credentials/v1",
"https://www.w3.org/2018/credentials/examples/v1",
"https://w3id.org/security/suites/jws-2020/v1"
],
"id": "http://example.gov/credentials/3732",
"type": ["VerifiableCredential", "UniversityDegreeCredential"],
"issuer": { "id": "did:example:123" },
"issuanceDate": "2020-03-10T04:24:12.164Z",
"credentialSubject": {
"id": "did:example:456",
"degree": {
"type": "BachelorDegree",
"name": "Bachelor of Science and Arts"
}
}
},
"vc_0": {
"@context": [
"https://www.w3.org/2018/credentials/v1",
"https://www.w3.org/2018/credentials/examples/v1",
"https://w3id.org/security/suites/jws-2020/v1"
],
"id": "http://example.gov/credentials/3732",
"type": ["VerifiableCredential", "UniversityDegreeCredential"],
"issuer": {
"id": "https://example.com/issuer/123"
},
"issuanceDate": "2020-03-10T04:24:12.164Z",
"credentialSubject": {
"id": "did:example:456",
"degree": {
"type": "BachelorDegree",
"name": "Bachelor of Science and Arts"
}
},
"proof": {
"type": "JsonWebSignature2020",
"created": "2019-12-11T03:50:55Z",
"jws": "eyJhbGciOiJFZERTQSIsImI2NCI6ZmFsc2UsImNyaXQiOlsiYjY0Il19..MJ5GwWRMsadCyLNXU_flgJtsS32584MydBxBuygps_cM0sbU3abTEOMyUvmLNcKOwOBE1MfDoB1_YY425W3sAg",
"proofPurpose": "assertionMethod",
"verificationMethod": "https://example.com/issuer/123#ovsDKYBjFemIy8DVhc-w2LSi8CvXMw2AYDzHj04yxkc"
}
}
}
</pre>
</section>
<section id="conformance">
<p>
A <dfn>conforming document</dfn> is any concrete expression of the data model
that complies with the normative statements in this specification.
Specifically, all relevant normative statements in Sections
<a href="#terminology"></a> and <a href="#suite-definition"></a>
of this document MUST be enforced.
</p>
<p>
A <code>conforming processor</code> is any algorithm realized as software and/or
hardware that generates or consumes a <a>conforming document</a>. Conforming
processors MUST produce errors when non-conforming documents are consumed.
</p>
<p>
This document also contains examples that contain JSON and JSON-LD content.
Some of these examples contain characters that are invalid JSON, such as
inline comments (<code>//</code>) and the use of ellipsis (<code>...</code>)
to denote information that adds little value to the example. Implementers are
cautioned to remove this content if they desire to use the information as
valid JSON or JSON-LD.
</p>
</section>
<section>
<h2>Privacy Considerations</h2>
<div class="issue">
TODO: We need to add a complete list of privacy considerations.
</div>
</section>
<section>
<h2>Security Considerations</h2>
<p>
The following section describes security considerations that developers
implementing this specification should be aware of in order to create
secure software.
</p>
<p class="note">This specification relies on URDNA2015.</p>
<p class="note">This specification relies on [[IANA_JOSE]], please review [[RFC8725]].</p>
<div class="issue">
TODO: We need to add a complete list of security considerations.
</div>
</section>
</body>
</html>