Pith Number

pith:N46UMRFT

pith:2024:N46UMRFTT55WGREQMRDFIUEWG4

not attested not anchored not stored refs pending

UTF:Undertrained Tokens as Fingerprints A Novel Approach to LLM Identification

Jiacheng Cai, Jiahao Yu, Yangguang Shao, Yuhang Wu

arxiv:2410.12318 v2 · 2024-10-16 · cs.CR · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N46UMRFTT55WGREQMRDFIUEWG4}

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.

Cited by

3 papers in Pith

Position: LLM Watermarking Should Align Stakeholders' Incentives for Practical Adoption

AttnDiff: Attention-based Differential Fingerprinting for Large Language Models

Receipt and verification

First computed	2026-07-05T11:35:51.601366Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6f3d4644b39f7b6344906446545096371a2eb4ab18b6914c455e4acc7341f8bc

Aliases

arxiv: 2410.12318 · arxiv_version: 2410.12318v2 · doi: 10.48550/arxiv.2410.12318 · pith_short_12: N46UMRFTT55W · pith_short_16: N46UMRFTT55WGREQ · pith_short_8: N46UMRFT

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/N46UMRFTT55WGREQMRDFIUEWG4 \
  | 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: 6f3d4644b39f7b6344906446545096371a2eb4ab18b6914c455e4acc7341f8bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1462ea968980b7d98198bd5d6c3e4875f580183ba891f8e15a3dd0e547cd4654",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2024-10-16T07:36:57Z",
    "title_canon_sha256": "43c85a21c5dfdbd67f8099a8235a4b4e6e4275051a476821cf91bfeb10b6a2ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2410.12318",
    "kind": "arxiv",
    "version": 2
  }
}