Pith Number

pith:6VNK3WI4

pith:2022:6VNK3WI42LQD2X6KHKATPSD7OU

not attested not anchored not stored refs pending

Increasing the Cost of Model Extraction with Calibrated Proof of Work

Adam Dziedzic, Muhammad Ahmad Kaleem, Nicolas Papernot, Yu Shen Lu

arxiv:2201.09243 v3 · 2022-01-23 · cs.CR · cs.AI · cs.CV · 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{6VNK3WI42LQD2X6KHKATPSD7OU}

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	2026-07-05T05:24:10.288868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f55aadd91cd2e03d5fca3a8137c87f752c293fe20c9868bec3afa6e39f1a4156

Aliases

arxiv: 2201.09243 · arxiv_version: 2201.09243v3 · doi: 10.48550/arxiv.2201.09243 · pith_short_12: 6VNK3WI42LQD · pith_short_16: 6VNK3WI42LQD2X6K · pith_short_8: 6VNK3WI4

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/6VNK3WI42LQD2X6KHKATPSD7OU \
  | 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: f55aadd91cd2e03d5fca3a8137c87f752c293fe20c9868bec3afa6e39f1a4156

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dfc436b7c764bbf566d7ccf179ff9c1d5ef0ada69a188eaa1ca4a861e1c024b2",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.CV",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2022-01-23T12:21:28Z",
    "title_canon_sha256": "75f601c77a28b557a79c976314287b9a6538b324cacbd17aed4f6b7c6a13ae7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2201.09243",
    "kind": "arxiv",
    "version": 3
  }
}