Pith Number

pith:QJRTJ5FR

pith:2019:QJRTJ5FREDIM4LK3EW35NBSCOB

not attested not anchored not stored refs pending

Helen: Maliciously Secure Coopetitive Learning for Linear Models

Ion Stoica, Joseph E. Gonzalez, Raluca Ada Popa, Wenting Zheng

arxiv:1907.07212 v2 · 2019-07-16 · 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{QJRTJ5FREDIM4LK3EW35NBSCOB}

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	2026-07-05T00:01:02.144915Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

826334f4b120d0ce2d5b25b7d6864270644c6c62b96e48c61db4754c67ba2120

Aliases

arxiv: 1907.07212 · arxiv_version: 1907.07212v2 · doi: 10.48550/arxiv.1907.07212 · pith_short_12: QJRTJ5FREDIM · pith_short_16: QJRTJ5FREDIM4LK3 · pith_short_8: QJRTJ5FR

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/QJRTJ5FREDIM4LK3EW35NBSCOB \
  | 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: 826334f4b120d0ce2d5b25b7d6864270644c6c62b96e48c61db4754c67ba2120

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90c824fc6103c14a65153ea1f3857d27ca24ae059984536bc0bd35148e82ef98",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2019-07-16T18:45:27Z",
    "title_canon_sha256": "7558794aac9d2094df7d6d58082ced3e82988a07e5d79adb7b96d033ffce08e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.07212",
    "kind": "arxiv",
    "version": 2
  }
}