Pith Number

pith:QNJLLFBZ

pith:2016:QNJLLFBZP2EONKV7CBWX7UJOAQ

not attested not anchored not stored refs pending

Semi-Fragile Image Authentication based on CFD and 3-Bit Quantization

Aleksey Zhuvikin, Guillermo Morales-Luna, Valery Korzhik

arxiv:1608.02291 v1 · 2016-08-08 · cs.MM · 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{QNJLLFBZP2EONKV7CBWX7UJOAQ}

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	2026-05-18T01:09:40.556258Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8352b594397e88e6aabf106d7fd12e040a03fa05431ef6070ffa0d7919084d89

Aliases

arxiv: 1608.02291 · arxiv_version: 1608.02291v1 · doi: 10.48550/arxiv.1608.02291 · pith_short_12: QNJLLFBZP2EO · pith_short_16: QNJLLFBZP2EONKV7 · pith_short_8: QNJLLFBZ

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/QNJLLFBZP2EONKV7CBWX7UJOAQ \
  | 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: 8352b594397e88e6aabf106d7fd12e040a03fa05431ef6070ffa0d7919084d89

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fe8650ddb8aff27c85c2fcc25cd52312cb467572b5214d242e3b9996fe8e691e",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.MM",
    "submitted_at": "2016-08-08T01:10:11Z",
    "title_canon_sha256": "ddc8aad11ef3d486d38620202d2deeb039bbedde0f988371c6be776d3c506c21"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.02291",
    "kind": "arxiv",
    "version": 1
  }
}