Pith Number

pith:TYYK3347

pith:2026:TYYK3347FAHMBZCEON2OLJS3O3

not attested not anchored not stored refs pending

Certified in Theory, Broken in Practice: Assumption Gaps in Cryptographic Model Certification

Akira Takahashi, Antigoni Polychroniadou, Carter Luck, Elisaweta Masserova, Nicolas Papernot, Olive Franzese-McLaughlin

arxiv:2607.21839 v1 · 2026-07-23 · cs.CR · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TYYK3347FAHMBZCEON2OLJS3O3}

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	2026-07-27T00:20:23.568692Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9e30adef9f280ec0e4447374e5a65b76f0d3aec9465511d0824da5441af38470

Aliases

arxiv: 2607.21839 · arxiv_version: 2607.21839v1 · doi: 10.48550/arxiv.2607.21839 · pith_short_12: TYYK3347FAHM · pith_short_16: TYYK3347FAHMBZCE · pith_short_8: TYYK3347

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/TYYK3347FAHMBZCEON2OLJS3O3 \
  | 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: 9e30adef9f280ec0e4447374e5a65b76f0d3aec9465511d0824da5441af38470

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "263d3f7571866251aef4dc1a17ca64e37fb37b53c3f05e47f29db098672d0fdd",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2026-07-23T22:06:12Z",
    "title_canon_sha256": "3845dd7b662255f5a59c49ec1501f80f062c8c1cda4c6d7802ec4942e5082a6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.21839",
    "kind": "arxiv",
    "version": 1
  }
}