Pith Number

pith:7FE2GNCI

pith:2025:7FE2GNCIG7CKXWKHRH7PHZZFDD

not attested not anchored not stored refs pending

Merge Hijacking: Backdoor Attacks to Model Merging of Large Language Models

Jiawen Shi, Lichao Sun, Pan Zhou, Yangming Xu, Zenghui Yuan

arxiv:2505.23561 v1 · 2025-05-29 · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7FE2GNCIG7CKXWKHRH7PHZZFDD}

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

2 papers in Pith

From Parameters to Feature Space: Task Arithmetic for Backdoor Mitigation in Model Merging

RogueMerge: Robust and Unified Attacks against LLM Model Merging

Receipt and verification

First computed	2026-07-05T11:12:03.968877Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f949a3344837c4abd94789fef3e72518ea993202f13b6f138400b8c46ddc7329

Aliases

arxiv: 2505.23561 · arxiv_version: 2505.23561v1 · doi: 10.48550/arxiv.2505.23561 · pith_short_12: 7FE2GNCIG7CK · pith_short_16: 7FE2GNCIG7CKXWKH · pith_short_8: 7FE2GNCI

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/7FE2GNCIG7CKXWKHRH7PHZZFDD \
  | 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: f949a3344837c4abd94789fef3e72518ea993202f13b6f138400b8c46ddc7329

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a9caf4dbd9efa530423ea8d42e1ad01d870fdc82dbdb114c78f2f929fd4bf46",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2025-05-29T15:37:23Z",
    "title_canon_sha256": "fe871070d517af4049526203f768dd886d2f49abd41be2030f6c5824fd3f499e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.23561",
    "kind": "arxiv",
    "version": 1
  }
}