Pith Number

pith:I2GFJPSD

pith:2025:I2GFJPSDEU4QP3F2Y3GZQIY357

not attested not anchored not stored refs pending

Kintsugi: Decentralized E2EE Key Recovery

Emilie Ma, Martin Kleppmann

arxiv:2507.21122 v1 · 2025-07-18 · cs.CR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I2GFJPSDEU4QP3F2Y3GZQIY357}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T11:44:31.567812Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

468c54be43253907ecbac6cd98231befda3ab55266f7647075d893e4231e845c

Aliases

arxiv: 2507.21122 · arxiv_version: 2507.21122v1 · doi: 10.48550/arxiv.2507.21122 · pith_short_12: I2GFJPSDEU4Q · pith_short_16: I2GFJPSDEU4QP3F2 · pith_short_8: I2GFJPSD

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/I2GFJPSDEU4QP3F2Y3GZQIY357 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 468c54be43253907ecbac6cd98231befda3ab55266f7647075d893e4231e845c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "875b181e386da56e1428b9c7689a4f40cea1a043e4e1a136add05871dc272828",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2025-07-18T15:29:51Z",
    "title_canon_sha256": "0b4cba00b1f02901e950f038c875ba2bcc19d97dcb1e95f134c9933b82eb0ca3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.21122",
    "kind": "arxiv",
    "version": 1
  }
}