Pith Number

pith:JDNRQ4CC

pith:2025:JDNRQ4CCKXJSLSF73RK4VMHKZJ

not attested not anchored not stored refs pending

Fingerprinting LLMs via Prompt Injection

Cheng Hong, Mengyuan Li, Neil Gong, Osama Ahmed, Yuepeng Hu, Zhengyuan Jiang, Zhicong Huang

arxiv:2509.25448 v3 · 2025-09-29 · 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{JDNRQ4CCKXJSLSF73RK4VMHKZJ}

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	2026-05-20T01:04:58.766082Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

48db18704255d325c8bfdc55cab0eaca56eaa83ea4dc1df69ed4d0cae9a6c69d

Aliases

arxiv: 2509.25448 · arxiv_version: 2509.25448v3 · doi: 10.48550/arxiv.2509.25448 · pith_short_12: JDNRQ4CCKXJS · pith_short_16: JDNRQ4CCKXJSLSF7 · pith_short_8: JDNRQ4CC

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/JDNRQ4CCKXJSLSF73RK4VMHKZJ \
  | 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: 48db18704255d325c8bfdc55cab0eaca56eaa83ea4dc1df69ed4d0cae9a6c69d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5a1a2c172c3e3c503a9ca9ed3e529109ee2a1d2256f6541687b8105a80a1018",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2025-09-29T19:54:36Z",
    "title_canon_sha256": "c19c28db0a4a773d374595fa34879bf8df26f96ed8732fc18af4c3d2142f254b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.25448",
    "kind": "arxiv",
    "version": 3
  }
}