Pith Number

pith:BW7O37JP

pith:2020:BW7O37JP74XVCCCWX2WK532YYB

not attested not anchored not stored refs pending

Privacy Risk and Preservation For COVID-19 Contact Tracing Apps

Dong Wang, Fang Liu

arxiv:2006.15433 v1 · 2020-06-27 · cs.CR · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BW7O37JP74XVCCCWX2WK532YYB}

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	2026-07-05T01:14:05.509744Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0dbeedfd2fff2f510856beacaeef58c0520c1900bbc79182b0f729f14ba8aaa4

Aliases

arxiv: 2006.15433 · arxiv_version: 2006.15433v1 · doi: 10.48550/arxiv.2006.15433 · pith_short_12: BW7O37JP74XV · pith_short_16: BW7O37JP74XVCCCW · pith_short_8: BW7O37JP

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/BW7O37JP74XVCCCWX2WK532YYB \
  | 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: 0dbeedfd2fff2f510856beacaeef58c0520c1900bbc79182b0f729f14ba8aaa4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5cc35457a45db975e31e6c0b7525d0c9fb836521ebce8dab699537e7050ec79",
    "cross_cats_sorted": [
      "cs.CY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2020-06-27T19:42:30Z",
    "title_canon_sha256": "1c0bf162caa0e57abfbf4bed5d739cccbbb6c302f791f5151dd849ba01a4a1a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2006.15433",
    "kind": "arxiv",
    "version": 1
  }
}