Pith Number

pith:KSDFST2N

pith:2011:KSDFST2NHGVAQGQTO2ITXE4JNO

not attested not anchored not stored refs pending

X-pire! - A digital expiration date for images in social networks

Julian Backes, Markus D\"urmuth, Michael Backes, Sebastian Gerling, Stefan Lorenz

arxiv:1112.2649 v1 · 2011-12-12 · 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{KSDFST2NHGVAQGQTO2ITXE4JNO}

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	2026-05-18T04:06:33.745692Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5486594f4d39aa081a1376913b93896b92e5213cfe89f418a1448acebcca85d1

Aliases

arxiv: 1112.2649 · arxiv_version: 1112.2649v1 · doi: 10.48550/arxiv.1112.2649 · pith_short_12: KSDFST2NHGVA · pith_short_16: KSDFST2NHGVAQGQT · pith_short_8: KSDFST2N

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/KSDFST2NHGVAQGQTO2ITXE4JNO \
  | 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: 5486594f4d39aa081a1376913b93896b92e5213cfe89f418a1448acebcca85d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df5302fbb2ba8457e8874b900db147680b27cae4bccd434c6e3ba2d3f6621779",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2011-12-12T18:24:21Z",
    "title_canon_sha256": "3a540cf84edc6bc091c8869c6181a5ffdc7ff72d73099d422f074e3023b17531"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.2649",
    "kind": "arxiv",
    "version": 1
  }
}