Pith Number

pith:TVHCCMR3

pith:2020:TVHCCMR3YSVDOTNTBG6YJNDS5L

not attested not anchored not stored refs pending

Epione: Lightweight Contact Tracing with Strong Privacy

Dawn Song, Kareem Shehata, Ni Trieu, Prateek Saxena, Reza Shokri

arxiv:2004.13293 v3 · 2020-04-28 · 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{TVHCCMR3YSVDOTNTBG6YJNDS5L}

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	2026-07-05T00:59:58.879950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d4e21323bc4aa374db309bd84b472eaea219809b75fc194a4e40891bb9033d7

Aliases

arxiv: 2004.13293 · arxiv_version: 2004.13293v3 · doi: 10.48550/arxiv.2004.13293 · pith_short_12: TVHCCMR3YSVD · pith_short_16: TVHCCMR3YSVDOTNT · pith_short_8: TVHCCMR3

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/TVHCCMR3YSVDOTNTBG6YJNDS5L \
  | 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: 9d4e21323bc4aa374db309bd84b472eaea219809b75fc194a4e40891bb9033d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0fefb714917417c8a902271b351453cbe4630076689fe7b4e206672e8e753c9c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2020-04-28T04:27:35Z",
    "title_canon_sha256": "8483609263f3a37a4628c5c65186c23ebe7a45cbb58fcc5fc096d6318f8c0680"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.13293",
    "kind": "arxiv",
    "version": 3
  }
}