Pith Number

pith:GA4IDJFQ

pith:2019:GA4IDJFQ7YCQZMDMWP7JT44R6B

not attested not anchored not stored refs pending

A new Capacity-Achieving Private Information Retrieval Scheme with (Almost) Optimal File Length for Coded Servers

Chao Qi, Jinbao Zhu, Qifa Yan, Xiaohu Tang

arxiv:1903.06921 v1 · 2019-03-16 · 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{GA4IDJFQ7YCQZMDMWP7JT44R6B}

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	2026-05-17T23:51:08.599426Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

303881a4b0fe050cb06cb3fe99f391f057d2333198c94665ff0922c61306e7f2

Aliases

arxiv: 1903.06921 · arxiv_version: 1903.06921v1 · doi: 10.48550/arxiv.1903.06921 · pith_short_12: GA4IDJFQ7YCQ · pith_short_16: GA4IDJFQ7YCQZMDM · pith_short_8: GA4IDJFQ

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/GA4IDJFQ7YCQZMDMWP7JT44R6B \
  | 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: 303881a4b0fe050cb06cb3fe99f391f057d2333198c94665ff0922c61306e7f2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da0cf8b2e34ca9787f9c379ba073d0c8ae8a8e696abde8902324c8963f1ccc61",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2019-03-16T13:48:31Z",
    "title_canon_sha256": "14a43e7753a2087b8fb736f5e9bce3fd4bedd8b41b99b28593898bbe1158c937"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.06921",
    "kind": "arxiv",
    "version": 1
  }
}