Pith Number

pith:UMHN2WVF

pith:2020:UMHN2WVFT6LRC43VYLI44GD2SD

not attested not anchored not stored refs pending

Computational Code-Based Single-Server Private Information Retrieval

Antonia Wachter-Zeh, Camilla Hollanti, Lukas Holzbaur

arxiv:2001.07049 v2 · 2020-01-20 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UMHN2WVFT6LRC43VYLI44GD2SD}

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	2026-07-05T01:02:45.115950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a30edd5aa59f97117375c2d1ce187a90fab4ff73f49d4b8cae99fdd44d2ebeaf

Aliases

arxiv: 2001.07049 · arxiv_version: 2001.07049v2 · doi: 10.48550/arxiv.2001.07049 · pith_short_12: UMHN2WVFT6LR · pith_short_16: UMHN2WVFT6LRC43V · pith_short_8: UMHN2WVF

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/UMHN2WVFT6LRC43VYLI44GD2SD \
  | 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: a30edd5aa59f97117375c2d1ce187a90fab4ff73f49d4b8cae99fdd44d2ebeaf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12b4e14ebd2018ef1f99bb18b65453300ab5e3352fe9b132a58582f78286a169",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2020-01-20T10:31:56Z",
    "title_canon_sha256": "982ccff71e0ed2cfe5d59e807a53cf548bcc431d353d432cba543207e758fc8f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.07049",
    "kind": "arxiv",
    "version": 2
  }
}