Pith Number

pith:P3KE4KIC

pith:2015:P3KE4KICFDQBUQJ44KWAXTSWOL

not attested not anchored not stored refs pending

Fighting Spam by Breaking the Econonmy of Advertisment by Unsolicited Emails

Alexander Schmidtke, Hans-Joachim Hof

arxiv:1506.06990 v1 · 2015-06-23 · 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{P3KE4KICFDQBUQJ44KWAXTSWOL}

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	2026-05-18T01:40:55.379963Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ed44e290228e01a413ce2ac0bce5672e878d6f37bdbab3c0f9e2239e01fea2d

Aliases

arxiv: 1506.06990 · arxiv_version: 1506.06990v1 · doi: 10.48550/arxiv.1506.06990 · pith_short_12: P3KE4KICFDQB · pith_short_16: P3KE4KICFDQBUQJ4 · pith_short_8: P3KE4KIC

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/P3KE4KICFDQBUQJ44KWAXTSWOL \
  | 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: 7ed44e290228e01a413ce2ac0bce5672e878d6f37bdbab3c0f9e2239e01fea2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d8389ddf391557c1f7079a5ec8083b751b6b532f9d3f502d774c634d1833d64",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2015-06-23T13:39:40Z",
    "title_canon_sha256": "89da521093edd7522a99c55790a41649ab3cc50730ada72a252be63d3e4630d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.06990",
    "kind": "arxiv",
    "version": 1
  }
}