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"generatedSubtitle": "W3C Candidate Recommendation Snapshot 07 November 2023"
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"generatedSubtitle": "W3C Candidate Recommendation Snapshot 14 November 2023"
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<p class="logos"><a class="logo" href="https://www.w3.org/"><img crossorigin="" alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2021/logos/W3C" width="72">
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<h1 id="title" class="title">Data Integrity EdDSA Cryptosuites v1.0</h1> <h2 id="subtitle" class="subtitle">Achieving Data Integrity using EdDSA with Edwards curves</h2>
<p id="w3c-state"><a href="https://www.w3.org/standards/types#CR">W3C Candidate Recommendation Snapshot</a> <time class="dt-published" datetime="2023-11-07">07 November 2023</time></p>
<p id="w3c-state"><a href="https://www.w3.org/standards/types#CR">W3C Candidate Recommendation Snapshot</a> <time class="dt-published" datetime="2023-11-14">14 November 2023</time></p>
<details open="">
<summary>More details about this document</summary>
<dl>
<dt>This version:</dt><dd>
<a class="u-url" href="https://www.w3.org/TR/2023/CR-vc-di-eddsa-20231107/">https://www.w3.org/TR/2023/CR-vc-di-eddsa-20231107/</a>
<a class="u-url" href="https://www.w3.org/TR/2023/CR-vc-di-eddsa-20231114/">https://www.w3.org/TR/2023/CR-vc-di-eddsa-20231114/</a>
</dd>
<dt>Latest published version:</dt><dd>
<a href="https://www.w3.org/TR/vc-di-eddsa/">https://www.w3.org/TR/vc-di-eddsa/</a>
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<p class="copyright">
<a href="https://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a>
<a href="https://www.w3.org/policies/#copyright">Copyright</a>
©
2023

<a href="https://www.w3.org/">World Wide Web Consortium</a>.
<abbr title="World Wide Web Consortium">W3C</abbr><sup>®</sup>
<a href="https://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>,
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<p>
This document was published by the <a href="https://www.w3.org/groups/wg/vc">Verifiable Credentials Working Group</a> as
a Candidate Recommendation Snapshot using the
<a href="https://www.w3.org/2023/Process-20230612/#recs-and-notes">Recommendation track</a>.
<a href="https://www.w3.org/2023/Process-20231103/#recs-and-notes">Recommendation track</a>.
</p><p>Publication as a Candidate Recommendation does not
imply endorsement by <abbr title="World Wide Web Consortium">W3C</abbr> and its Members. A Candidate Recommendation Snapshot has received
<a href="https://www.w3.org/2023/Process-20230612/#dfn-wide-review">wide review</a>, is intended to
<a href="https://www.w3.org/2023/Process-20231103/#dfn-wide-review">wide review</a>, is intended to
gather
<a href="https://w3c.github.io/vc-data-integrity/implementations/">implementation experience</a>,
and has commitments from Working Group members to
<a href="https://www.w3.org/Consortium/Patent-Policy/#sec-Requirements">royalty-free licensing</a>
for implementations.</p><p>
This Candidate Recommendation is not expected to advance to Proposed
Recommendation any earlier than 07 January 2024.
Recommendation any earlier than 17 January 2024.
</p><p>

This document was produced by a group
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</p><p>
This document is governed by the
<a id="w3c_process_revision" href="https://www.w3.org/2023/Process-20230612/">12 June 2023 <abbr title="World Wide Web Consortium">W3C</abbr> Process Document</a>.
<a id="w3c_process_revision" href="https://www.w3.org/2023/Process-20231103/">03 November 2023 <abbr title="World Wide Web Consortium">W3C</abbr> Process Document</a>.
</p></section><nav id="toc"><h2 class="introductory" id="table-of-contents">Table of Contents</h2><ol class="toc"><li class="tocline"><a class="tocxref" href="#abstract">Abstract</a></li><li class="tocline"><a class="tocxref" href="#sotd">Status of This Document</a></li><li class="tocline"><a class="tocxref" href="#introduction"><bdi class="secno">1. </bdi>Introduction</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#terminology"><bdi class="secno">1.1 </bdi>Terminology</a></li><li class="tocline"><a class="tocxref" href="#conformance"><bdi class="secno">1.2 </bdi>Conformance</a></li></ol></li><li class="tocline"><a class="tocxref" href="#data-model"><bdi class="secno">2. </bdi>Data Model</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#verification-methods"><bdi class="secno">2.1 </bdi>Verification Methods</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#multikey"><bdi class="secno">2.1.1 </bdi>Multikey</a></li></ol></li><li class="tocline"><a class="tocxref" href="#proof-representations"><bdi class="secno">2.2 </bdi>Proof Representations</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#dataintegrityproof"><bdi class="secno">2.2.1 </bdi>DataIntegrityProof</a></li></ol></li></ol></li><li class="tocline"><a class="tocxref" href="#algorithms"><bdi class="secno">3. </bdi>Algorithms</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#eddsa-rdfc-2022"><bdi class="secno">3.1 </bdi>eddsa-rdfc-2022</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#add-proof-eddsa-rdfc-2022"><bdi class="secno">3.1.1 </bdi>Add Proof (eddsa-rdfc-2022)</a></li><li class="tocline"><a class="tocxref" href="#verify-proof-eddsa-rdfc-2022"><bdi class="secno">3.1.2 </bdi>Verify Proof (eddsa-rdfc-2022)</a></li><li class="tocline"><a class="tocxref" href="#transformation-eddsa-rdfc-2022"><bdi class="secno">3.1.3 </bdi>Transformation (eddsa-rdfc-2022)</a></li><li class="tocline"><a class="tocxref" href="#hashing-eddsa-rdfc-2022"><bdi class="secno">3.1.4 </bdi>Hashing (eddsa-rdfc-2022)</a></li><li class="tocline"><a class="tocxref" href="#proof-configuration-eddsa-rdfc-2022"><bdi class="secno">3.1.5 </bdi>Proof Configuration (eddsa-rdfc-2022)</a></li><li class="tocline"><a class="tocxref" href="#proof-serialization-eddsa-rdfc-2022"><bdi class="secno">3.1.6 </bdi>Proof Serialization (eddsa-rdfc-2022)</a></li><li class="tocline"><a class="tocxref" href="#proof-verification-eddsa-rdfc-2022"><bdi class="secno">3.1.7 </bdi>Proof Verification (eddsa-rdfc-2022)</a></li></ol></li><li class="tocline"><a class="tocxref" href="#eddsa-jcs-2022"><bdi class="secno">3.2 </bdi>eddsa-jcs-2022</a></li></ol></li><li class="tocline"><a class="tocxref" href="#security-considerations"><bdi class="secno">4. </bdi>Security Considerations</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#security-properties-of-ed25519-implementations"><bdi class="secno">4.1 </bdi>Security Properties of Ed25519 Implementations</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#signature-security-properties"><bdi class="secno">4.1.1 </bdi>Signature Security Properties</a></li><li class="tocline"><a class="tocxref" href="#achieving-ed25519-security-properties"><bdi class="secno">4.1.2 </bdi>Achieving Ed25519 Security Properties</a></li></ol></li></ol></li><li class="tocline"><a class="tocxref" href="#privacy-considerations"><bdi class="secno">5. </bdi>Privacy Considerations</a></li><li class="tocline"><a class="tocxref" href="#the-ed25519signature2020-suite"><bdi class="secno">A. </bdi>The Ed25519Signature2020 Suite</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#data-model-0"><bdi class="secno">A.1 </bdi>Data Model</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#verification-methods-0"><bdi class="secno">A.1.1 </bdi>Verification Methods</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#ed25519verificationkey2020"><bdi class="secno">A.1.1.1 </bdi>Ed25519VerificationKey2020</a></li></ol></li><li class="tocline"><a class="tocxref" href="#proof-representations-0"><bdi class="secno">A.1.2 </bdi>Proof representations</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#ed25519signature2020"><bdi class="secno">A.1.2.1 </bdi>Ed25519Signature2020</a></li></ol></li></ol></li><li class="tocline"><a class="tocxref" href="#algorithms-0"><bdi class="secno">A.2 </bdi>Algorithms</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#ed25519signature2020-0"><bdi class="secno">A.2.1 </bdi>Ed25519Signature2020</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#add-proof-ed25519signature2020"><bdi class="secno">A.2.1.1 </bdi>Add Proof (Ed25519Signature2020)</a></li><li class="tocline"><a class="tocxref" href="#verify-proof-ed25519signature2020"><bdi class="secno">A.2.1.2 </bdi>Verify Proof (Ed25519Signature2020)</a></li><li class="tocline"><a class="tocxref" href="#transformation-ed25519signature2020"><bdi class="secno">A.2.1.3 </bdi>Transformation (Ed25519Signature2020)</a></li><li class="tocline"><a class="tocxref" href="#hashing-ed25519signature2020"><bdi class="secno">A.2.1.4 </bdi>Hashing (Ed25519Signature2020)</a></li><li class="tocline"><a class="tocxref" href="#proof-configuration-ed25519signature2020"><bdi class="secno">A.2.1.5 </bdi>Proof Configuration (Ed25519Signature2020)</a></li><li class="tocline"><a class="tocxref" href="#proof-serialization-ed25519signature2020"><bdi class="secno">A.2.1.6 </bdi>Proof Serialization (Ed25519Signature2020)</a></li><li class="tocline"><a class="tocxref" href="#proof-verification-ed25519signature2020"><bdi class="secno">A.2.1.7 </bdi>Proof Verification (Ed25519Signature2020)</a></li></ol></li></ol></li></ol></li><li class="tocline"><a class="tocxref" href="#test-vectors"><bdi class="secno">B. </bdi>Test Vectors</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#representation-eddsa-rdfc-2022"><bdi class="secno">B.1 </bdi>Representation: eddsa-rdfc-2022</a></li><li class="tocline"><a class="tocxref" href="#representation-eddsa-jcs-2022"><bdi class="secno">B.2 </bdi>Representation: eddsa-jcs-2022</a></li><li class="tocline"><a class="tocxref" href="#representation-ed25519signature2020"><bdi class="secno">B.3 </bdi>Representation: Ed25519Signature2020</a></li></ol></li><li class="tocline"><a class="tocxref" href="#revision-history"><bdi class="secno">C. </bdi>Revision History</a></li><li class="tocline"><a class="tocxref" href="#references"><bdi class="secno">D. </bdi>References</a><ol class="toc"><li class="tocline"><a class="tocxref" href="#normative-references"><bdi class="secno">D.1 </bdi>Normative references</a></li><li class="tocline"><a class="tocxref" href="#informative-references"><bdi class="secno">D.2 </bdi>Informative references</a></li></ol></li></ol></nav>

<section id="introduction"><div class="header-wrapper"><h2 id="x1-introduction"><bdi class="secno">1. </bdi>Introduction</h2><a class="self-link" href="#introduction" aria-label="Permalink for Section 1."></a></div>
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<section id="references" class="appendix"><div class="header-wrapper"><h2 id="d-references"><bdi class="secno">D. </bdi>References</h2><a class="self-link" href="#references" aria-label="Permalink for Appendix D."></a></div><section id="normative-references"><div class="header-wrapper"><h3 id="d-1-normative-references"><bdi class="secno">D.1 </bdi>Normative references</h3><a class="self-link" href="#normative-references" aria-label="Permalink for Appendix D.1"></a></div>

<dl class="bibliography"><dt id="bib-rdf-canon">[RDF-CANON]</dt><dd>
<a href="https://www.w3.org/TR/rdf-canon/"><cite>RDF Dataset Canonicalization</cite></a>. Dave Longley; Gregg Kellogg; Dan Yamamoto. W3C. 4 October 2023. W3C Working Draft. URL: <a href="https://www.w3.org/TR/rdf-canon/">https://www.w3.org/TR/rdf-canon/</a>
<a href="https://www.w3.org/TR/rdf-canon/"><cite>RDF Dataset Canonicalization</cite></a>. Gregg Kellogg; Dave Longley; Dan Yamamoto. W3C. 31 October 2023. W3C Candidate Recommendation. URL: <a href="https://www.w3.org/TR/rdf-canon/">https://www.w3.org/TR/rdf-canon/</a>
</dd><dt id="bib-rfc2119">[RFC2119]</dt><dd>
<a href="https://www.rfc-editor.org/rfc/rfc2119"><cite>Key words for use in RFCs to Indicate Requirement Levels</cite></a>. S. Bradner. IETF. March 1997. Best Current Practice. URL: <a href="https://www.rfc-editor.org/rfc/rfc2119">https://www.rfc-editor.org/rfc/rfc2119</a>
</dd><dt id="bib-rfc3986">[RFC3986]</dt><dd>
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</dd><dt id="bib-taming_eddsas">[Taming_EdDSAs]</dt><dd>
<a href="https://eprint.iacr.org/2020/1244"><cite>Taming the many EdDSAs</cite></a>. Konstantinos Chalkias; François Garillot; Valeria Nikolaenko. Cryptology ePrint Archive, Paper 2020/1244. 2020. URL: <a href="https://eprint.iacr.org/2020/1244">https://eprint.iacr.org/2020/1244</a>
</dd><dt id="bib-vc-data-model-2.0">[VC-DATA-MODEL-2.0]</dt><dd>
<a href="https://www.w3.org/TR/vc-data-model-2.0/"><cite>Verifiable Credentials Data Model v2.0</cite></a>. Manu Sporny; Orie Steele; Michael Jones; Gabe Cohen; Oliver Terbu. W3C. 16 October 2023. W3C Working Draft. URL: <a href="https://www.w3.org/TR/vc-data-model-2.0/">https://www.w3.org/TR/vc-data-model-2.0/</a>
<a href="https://www.w3.org/TR/vc-data-model-2.0/"><cite>Verifiable Credentials Data Model v2.0</cite></a>. Manu Sporny; Orie Steele; Michael Jones; Gabe Cohen; Oliver Terbu. W3C. 4 November 2023. W3C Working Draft. URL: <a href="https://www.w3.org/TR/vc-data-model-2.0/">https://www.w3.org/TR/vc-data-model-2.0/</a>
</dd></dl>
</section></section><p role="navigation" id="back-to-top">
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group: "vc",

// if you wish the publication date to be other than today, set this
publishDate: "2023-11-07",
publishDate: "2023-11-14",

// if there is a previously published draft, uncomment this and set its YYYY-MM-DD date
// and its maturity status
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// if this is a LCWD, uncomment and set the end of its review period
implementationReportURI: "https://w3c.github.io/vc-data-integrity/implementations/",
crEnd: "2024-01-07",
crEnd: "2024-01-17",

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