Pith Number

pith:UK2TEULT

pith:2020:UK2TEULTNDY6IUXUG3RLVQJLYD

not attested not anchored not stored refs pending

Private-Yet-Verifiable Contact Tracing

Andrea Canidio, Gabriele Costa, Letterio Galletta

arxiv:2010.09303 v1 · 2020-10-19 · 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{UK2TEULTNDY6IUXUG3RLVQJLYD}

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	2026-07-05T01:44:02.813165Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2b532517368f1e452f436e2bac12bc0e2ba6898b5192b0cf8e4ab778b8a5c09

Aliases

arxiv: 2010.09303 · arxiv_version: 2010.09303v1 · doi: 10.48550/arxiv.2010.09303 · pith_short_12: UK2TEULTNDY6 · pith_short_16: UK2TEULTNDY6IUXU · pith_short_8: UK2TEULT

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/UK2TEULTNDY6IUXUG3RLVQJLYD \
  | 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: a2b532517368f1e452f436e2bac12bc0e2ba6898b5192b0cf8e4ab778b8a5c09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8c25da1b1ebd3833f31dcec6713875eb2985c10f0c8cba9495a12e349d70d76",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2020-10-19T08:24:21Z",
    "title_canon_sha256": "e39aaa903eaab9499a8f8adf3c698ad4708b60f8b387e13d293d1787044e9f5b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2010.09303",
    "kind": "arxiv",
    "version": 1
  }
}