Pith Number

pith:2QALEHR2

pith:2018:2QALEHR2LYNF5I4KKY4DJB43UN

not attested not anchored not stored refs pending

Securing quantum key distribution systems using fewer states

Charles Ci Wen Lim, Clinton Cahall, Daniel J. Gauthier, Jungsang Kim, Nurul T. Islam

arxiv:1801.03202 v4 · 2018-01-10 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2QALEHR2LYNF5I4KKY4DJB43UN}

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	2026-05-18T00:17:01.389809Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d400b21e3a5e1a5ea38a563834879ba349d3ff2040f7ab40f3fb1b56644a265e

Aliases

arxiv: 1801.03202 · arxiv_version: 1801.03202v4 · doi: 10.48550/arxiv.1801.03202 · pith_short_12: 2QALEHR2LYNF · pith_short_16: 2QALEHR2LYNF5I4K · pith_short_8: 2QALEHR2

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/2QALEHR2LYNF5I4KKY4DJB43UN \
  | 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: d400b21e3a5e1a5ea38a563834879ba349d3ff2040f7ab40f3fb1b56644a265e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0fa16a0e19f1fae54afd43ea768f3657f78d618e3d9a9207522c388da1637f2a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2018-01-10T01:04:17Z",
    "title_canon_sha256": "40ababcd2e2de1f21137db946d76604067174ebb6ed7d80d8aeb0bb57f021cd1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.03202",
    "kind": "arxiv",
    "version": 4
  }
}