Pith Number

pith:6SPE2ZQY

pith:2015:6SPE2ZQYHLLDAUFKZPTMFDGKLO

not attested not anchored not stored refs pending

A Security-assured Accuracy-maximised Privacy Preserving Collaborative Filtering Recommendation Algorithm

Hong Shen, Zhigang Lu

arxiv:1506.00001 v2 · 2015-05-29 · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6SPE2ZQYHLLDAUFKZPTMFDGKLO}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:57:41.550254Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f49e4d66183ad63050aacbe6c28cca5ba6b76b6a1119547ae167c8362e836b1f

Aliases

arxiv: 1506.00001 · arxiv_version: 1506.00001v2 · doi: 10.48550/arxiv.1506.00001 · pith_short_12: 6SPE2ZQYHLLD · pith_short_16: 6SPE2ZQYHLLDAUFK · pith_short_8: 6SPE2ZQY

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/6SPE2ZQYHLLDAUFKZPTMFDGKLO \
  | 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: f49e4d66183ad63050aacbe6c28cca5ba6b76b6a1119547ae167c8362e836b1f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "953e15f2f2746afce13cb699fddd133278fb37b287345a58b4a2617044348652",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2015-05-29T01:20:42Z",
    "title_canon_sha256": "559e304447c1ababe753e95e329293cf01068e2559fc67d841d048a7d1077e43"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.00001",
    "kind": "arxiv",
    "version": 2
  }
}