Pith Number

pith:QSXWJLBB

pith:2021:QSXWJLBBNHAWTXQ7OC5PUZXZFC

not attested not anchored not stored refs pending

Beating Classical Impossibility of Position Verification

Jiahui Liu, Luowen Qian, Qipeng Liu

arxiv:2109.07517 v2 · 2021-09-15 · 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{QSXWJLBBNHAWTXQ7OC5PUZXZFC}

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.

Cited by

1 paper in Pith

Towards experimental demonstration of quantum position verification using true single photons

Receipt and verification

First computed	2026-07-05T03:45:11.850722Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84af64ac2169c169de1f70bafa66f928b5c064ff68090d968ec5ad54bf3f9c30

Aliases

arxiv: 2109.07517 · arxiv_version: 2109.07517v2 · doi: 10.48550/arxiv.2109.07517 · pith_short_12: QSXWJLBBNHAW · pith_short_16: QSXWJLBBNHAWTXQ7 · pith_short_8: QSXWJLBB

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/QSXWJLBBNHAWTXQ7OC5PUZXZFC \
  | 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: 84af64ac2169c169de1f70bafa66f928b5c064ff68090d968ec5ad54bf3f9c30

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db4108cfc657d57f1e0a9e89b93f6d01e1f4f60df86d0cf2255fc9b51048947f",
    "cross_cats_sorted": [
      "cs.CR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2021-09-15T18:23:15Z",
    "title_canon_sha256": "a09e78a3a2ef8a5fab2a70036859676f864306a461db0000bce1da67e982e0f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.07517",
    "kind": "arxiv",
    "version": 2
  }
}