Pith Number

pith:UB5NTZGK

pith:2026:UB5NTZGKDRMQ6IDMQDBLYFMJ4W

not attested not anchored not stored refs pending

SkillJack: Persistent Skill Backdoors in Self-Evolving Agents

Huangsheng Cheng, Huiyu Wu, Jing Guo, Xiangfan Wu, Xiaorong Shi, Xing Zheng, Zonghao Ying

arxiv:2608.03509 v1 · 2026-08-04 · 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{UB5NTZGKDRMQ6IDMQDBLYFMJ4W}

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	2026-08-05T01:35:59.911028Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a07ad9e4ca1c590f206c80c2bc1589e5ad809ae7554ccd1650717d50cd2f31c5

Aliases

arxiv: 2608.03509 · arxiv_version: 2608.03509v1 · doi: 10.48550/arxiv.2608.03509 · pith_short_12: UB5NTZGKDRMQ · pith_short_16: UB5NTZGKDRMQ6IDM · pith_short_8: UB5NTZGK

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/UB5NTZGKDRMQ6IDMQDBLYFMJ4W \
  | 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: a07ad9e4ca1c590f206c80c2bc1589e5ad809ae7554ccd1650717d50cd2f31c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c7edcb8a5850e4b72c7cd43bfb2a074d2bbf1e322a6abd123b9146d23122b7f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2026-08-04T11:51:23Z",
    "title_canon_sha256": "30bf255b65d1b15b6907b25cfe60bbb72836842809a724b06160fd21f8f02e25"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2608.03509",
    "kind": "arxiv",
    "version": 1
  }
}