Pith Number

pith:BKZYQ5WL

pith:2025:BKZYQ5WLBTXOL7KC636QL7G7XT

not attested not anchored not stored refs pending

System design and realisation towards optimising secure key bits in free space QKD

Ayan Biswas, Jayanth Ramakrishnan, Pooja Chandravanshi, Ravindra P. Singh, Tanya Sharma

arxiv:2508.10458 v1 · 2025-08-14 · quant-ph · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BKZYQ5WLBTXOL7KC636QL7G7XT}

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	2026-07-05T11:53:56.812810Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ab38876cb0ceee5fd42f6fd05fcdfbcc501bc71a949b53b4a6a4443642cf025

Aliases

arxiv: 2508.10458 · arxiv_version: 2508.10458v1 · doi: 10.48550/arxiv.2508.10458 · pith_short_12: BKZYQ5WLBTXO · pith_short_16: BKZYQ5WLBTXOL7KC · pith_short_8: BKZYQ5WL

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/BKZYQ5WLBTXOL7KC636QL7G7XT \
  | 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: 0ab38876cb0ceee5fd42f6fd05fcdfbcc501bc71a949b53b4a6a4443642cf025

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78d06dc86a243f64c55f2fdee761846cd1437d4167017ebb793df88a0ab26975",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-08-14T08:57:59Z",
    "title_canon_sha256": "bfc5c07bf3735a4be7aa300f0abbe119f7e66fdba606976d1d8edb65ca4a77e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.10458",
    "kind": "arxiv",
    "version": 1
  }
}