Pith Number

pith:5ZLAGH2Q

pith:2020:5ZLAGH2QXMV5RKUUHXSZKNTGAP

not attested not anchored not stored refs pending

CONTAIN: Privacy-oriented Contact Tracing Protocols for Epidemics

Arvin Hekmati, Bhaskar Krishnamachari, Gowri Ramachandran

arxiv:2004.05251 v1 · 2020-04-10 · 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{5ZLAGH2QXMV5RKUUHXSZKNTGAP}

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	2026-07-05T00:54:35.362495Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ee56031f50bb2bd8aa943de595366603c2e3150320bd8c5e5a82c64ebdd07556

Aliases

arxiv: 2004.05251 · arxiv_version: 2004.05251v1 · doi: 10.48550/arxiv.2004.05251 · pith_short_12: 5ZLAGH2QXMV5 · pith_short_16: 5ZLAGH2QXMV5RKUU · pith_short_8: 5ZLAGH2Q

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/5ZLAGH2QXMV5RKUUHXSZKNTGAP \
  | 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: ee56031f50bb2bd8aa943de595366603c2e3150320bd8c5e5a82c64ebdd07556

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "93df1c318c14ac7f0f26409bb50634616ad3ac2db025f23f41eaaf045e6aaf50",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2020-04-10T22:50:06Z",
    "title_canon_sha256": "dc0ee9f013bb060ff87b450c675de5c2b9b758cf7d0835af0c3fc1bdbc6c3d31"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.05251",
    "kind": "arxiv",
    "version": 1
  }
}