Pith Number

pith:QWY4WPFO

pith:2019:QWY4WPFOJWPHJWVJNW4NCEQBKO

not attested not anchored not stored refs pending

Practical security of continuous-variable quantum key distribution with reduced optical attenuation

Anqi Huang, Guihua Zeng, Jinye Peng, Peng Huang, Yi Zheng

arxiv:1904.08777 v1 · 2019-04-17 · 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{QWY4WPFOJWPHJWVJNW4NCEQBKO}

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	2026-05-17T23:40:32.515432Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85b1cb3cae4d9e74daa96db8d1120153867ac0400720ad0c6ae88154bd1e79e1

Aliases

arxiv: 1904.08777 · arxiv_version: 1904.08777v1 · doi: 10.48550/arxiv.1904.08777 · pith_short_12: QWY4WPFOJWPH · pith_short_16: QWY4WPFOJWPHJWVJ · pith_short_8: QWY4WPFO

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/QWY4WPFOJWPHJWVJNW4NCEQBKO \
  | 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: 85b1cb3cae4d9e74daa96db8d1120153867ac0400720ad0c6ae88154bd1e79e1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "be095011b92d1aa98691b8e33eff5fe5674b04f3a1bdaf4cc6a0b3423aaeac5a",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-04-17T02:39:48Z",
    "title_canon_sha256": "4829329d456ca951b8b5001a93be3dd49119babed03d41425731972135a0516d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.08777",
    "kind": "arxiv",
    "version": 1
  }
}