Pith Number

pith:PGGOHT2B

pith:2015:PGGOHT2BDJGI264DXPNBZMHNPL

not attested not anchored not stored refs pending

An SVD-based Fragile Watermarking Scheme With Grouped Blocks

Hu Chen, Ke Li, Qingbo Kang

arxiv:1502.02809 v2 · 2015-02-10 · cs.CR · cs.MM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PGGOHT2BDJGI264DXPNBZMHNPL}

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	2026-05-18T02:27:20.605711Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

798ce3cf411a4c8d7b83bbda1cb0ed7acbbebdb5acf1d95aa2f79f28b380210c

Aliases

arxiv: 1502.02809 · arxiv_version: 1502.02809v2 · doi: 10.48550/arxiv.1502.02809 · pith_short_12: PGGOHT2BDJGI · pith_short_16: PGGOHT2BDJGI264D · pith_short_8: PGGOHT2B

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/PGGOHT2BDJGI264DXPNBZMHNPL \
  | 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: 798ce3cf411a4c8d7b83bbda1cb0ed7acbbebdb5acf1d95aa2f79f28b380210c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f2602ee977c3ef04c30bf2b3356c9555d8dd156fdd1f27858b657916dfb789d2",
    "cross_cats_sorted": [
      "cs.MM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2015-02-10T08:18:10Z",
    "title_canon_sha256": "98e0dc080b022a72fbe58cb97996ad1ae0dc2bfb21af73381283e1d0a2828c27"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.02809",
    "kind": "arxiv",
    "version": 2
  }
}