Pith Number

pith:D3Y4Y3UA

pith:2026:D3Y4Y3UAAIG6KAO46HDCS56J5X

not attested not anchored not stored refs pending

Block-wise Codeword Embedding for Reliable Multi-bit Text Watermarking

Dongsup Jin, HoEun Kim, Joeun Kim, Young-Sik Kim

Multi-bit LLM watermarking can reach 96.5 percent true positives at only 2 percent false positives by separating block-wise message estimation from window-shifting verification.

arxiv:2605.00348 v2 · 2026-05-01 · cs.CR · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D3Y4Y3UAAIG6KAO46HDCS56J5X}

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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.

Claims

C1strongest claim

BREW achieves a TPR of 0.965 with an FPR of 0.02 under 10% synonym substitution, demonstrating that the high-FPR issue is not an inherent trade-off of multi-bit watermarking, but a solvable structural flaw of prior decoding-centric designs.

C2weakest assumption

The two-stage mechanism of blind message estimation via independent block voting followed by window-shifting verification will rigorously validate the payload against local edits without introducing new failure modes or depending on unstated properties of the underlying LLM distribution.

C3one line summary

BREW achieves TPR of 0.965 and FPR of 0.02 under 10% synonym substitution by shifting from ECC decoding to designated verification with block voting and local validation.

Receipt and verification

First computed	2026-06-24T01:14:28.155958Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1ef1cc6e80020de501dcf1c62977c9edec3afd3058762feefda014f45f60d26c

Aliases

arxiv: 2605.00348 · arxiv_version: 2605.00348v2 · doi: 10.48550/arxiv.2605.00348 · pith_short_12: D3Y4Y3UAAIG6 · pith_short_16: D3Y4Y3UAAIG6KAO4 · pith_short_8: D3Y4Y3UA

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/D3Y4Y3UAAIG6KAO46HDCS56J5X \
  | 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: 1ef1cc6e80020de501dcf1c62977c9edec3afd3058762feefda014f45f60d26c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28a72ea14f482ecaa8763aeed73cc9423891c6b77830fe2e3feccf2f3150e2a9",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2026-05-01T02:14:38Z",
    "title_canon_sha256": "4ca2bdde56b513257ff507ae1f28d029ffdf3873c9723cf3edcfb4f1ca49c364"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.00348",
    "kind": "arxiv",
    "version": 2
  }
}