Pith Number

pith:EZPQGWSX

pith:2013:EZPQGWSXEU2LSYPWCAXBXHL6PI

not attested not anchored not stored refs pending

A geometric protocol for cryptography with cards

Andr\'es Cord\'on-Franco, David Fern\'andez-Duque, Fernando Soler-Toscano, Hans van Ditmarsch

arxiv:1301.4289 v2 · 2013-01-18 · cs.CR · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EZPQGWSXEU2LSYPWCAXBXHL6PI}

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	2026-05-18T03:35:37.884237Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

265f035a572534b961f6102e1b9d7e7a24a1c590d6a50e97041be2ac569a0b8c

Aliases

arxiv: 1301.4289 · arxiv_version: 1301.4289v2 · doi: 10.48550/arxiv.1301.4289 · pith_short_12: EZPQGWSXEU2L · pith_short_16: EZPQGWSXEU2LSYPW · pith_short_8: EZPQGWSX

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/EZPQGWSXEU2LSYPWCAXBXHL6PI \
  | 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: 265f035a572534b961f6102e1b9d7e7a24a1c590d6a50e97041be2ac569a0b8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7fec6c28f28a7a21ce0275de654f28ae605dfeabe4963edb8966ab6b1806530c",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2013-01-18T03:49:00Z",
    "title_canon_sha256": "8704983c510da08ad4ed2b1166059facce554780847d4498b7266a9ee54ba683"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.4289",
    "kind": "arxiv",
    "version": 2
  }
}