Pith Number

pith:EPEH2FEV

pith:2012:EPEH2FEVTD2XSCXUICWQKB4XR5

not attested not anchored not stored refs pending

I Have the Proof: Providing Proofs of Past Data Possession in Cloud Forensics

Ragib Hasan, Shams Zawoad

arxiv:1211.4328 v1 · 2012-11-19 · cs.CR · cs.DC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EPEH2FEVTD2XSCXUICWQKB4XR5}

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	2026-05-18T03:40:27.268000Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23c87d149598f5790af440ad0507978f7204f12496f12a1536da9cca3590064d

Aliases

arxiv: 1211.4328 · arxiv_version: 1211.4328v1 · doi: 10.48550/arxiv.1211.4328 · pith_short_12: EPEH2FEVTD2X · pith_short_16: EPEH2FEVTD2XSCXU · pith_short_8: EPEH2FEV

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/EPEH2FEVTD2XSCXUICWQKB4XR5 \
  | 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: 23c87d149598f5790af440ad0507978f7204f12496f12a1536da9cca3590064d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92d4e295608b29133091ea776e882318a18943a67757528a62652d33502e4ec4",
    "cross_cats_sorted": [
      "cs.DC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2012-11-19T08:16:59Z",
    "title_canon_sha256": "6b0a390e5fcebee92fdb4a3fc278deceb7cf028e082a8e31c544eb86b070b40a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.4328",
    "kind": "arxiv",
    "version": 1
  }
}