Pith Number

pith:WDUBR5MM

pith:2025:WDUBR5MMJ4NDN7LNIKLXPJNDFH

not attested not anchored not stored refs pending

Impossibility of Quantum Private Queries

Esther H\"anggi, Severin Winkler

arxiv:2501.12842 v4 · 2025-01-22 · quant-ph · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WDUBR5MMJ4NDN7LNIKLXPJNDFH}

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	2026-07-05T12:06:04.784671Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0e818f58c4f1a36fd6d429777a5a329f194fb51affd420f26b4d61a8c4a2273

Aliases

arxiv: 2501.12842 · arxiv_version: 2501.12842v4 · doi: 10.48550/arxiv.2501.12842 · pith_short_12: WDUBR5MMJ4ND · pith_short_16: WDUBR5MMJ4NDN7LN · pith_short_8: WDUBR5MM

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/WDUBR5MMJ4NDN7LNIKLXPJNDFH \
  | 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: b0e818f58c4f1a36fd6d429777a5a329f194fb51affd420f26b4d61a8c4a2273

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f0196c18ea88a7c2ac79c81d5371aef010c76b059a71317f4f5a72d5ec513868",
    "cross_cats_sorted": [
      "cs.CR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-01-22T12:42:28Z",
    "title_canon_sha256": "00eb657797e5ac95752ea0932dc11168ea92b3e6874a09b1f7c5a83ddf1c795b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.12842",
    "kind": "arxiv",
    "version": 4
  }
}