Pith Number

pith:Z5QAK5JD

pith:2005:Z5QAK5JDTL4GEDAFT6GMBKLF7T

not attested not anchored not stored refs pending

Quantum secure direct communication with quantum encryption based on pure entangled states

Chun-Yan Li, Fu-Guo Deng, Hong-Yu Zhou, Ping Zhou, Xi-Han Li, Yu-Jie Liang

arxiv:quant-ph/0512014 v2 · 2005-12-02 · 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{Z5QAK5JDTL4GEDAFT6GMBKLF7T}

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	2026-07-04T15:03:21.807867Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf600575239af8620c059f8cc0a965fcc451f10bc8baafdb6c18c1cd6ea796e8

Aliases

arxiv: quant-ph/0512014 · arxiv_version: quant-ph/0512014v2 · doi: 10.48550/arxiv.quant-ph/0512014 · pith_short_12: Z5QAK5JDTL4G · pith_short_16: Z5QAK5JDTL4GEDAF · pith_short_8: Z5QAK5JD

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/Z5QAK5JDTL4GEDAFT6GMBKLF7T \
  | 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: cf600575239af8620c059f8cc0a965fcc451f10bc8baafdb6c18c1cd6ea796e8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6477d59a8866684258e3dfa0270c58fb1bd84344f596a06e77995389550d8f34",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2005-12-02T00:11:52Z",
    "title_canon_sha256": "e45b3044573df190fc7c769b58a424e739fcf0c282e1c60a3fe312923c20c2d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0512014",
    "kind": "arxiv",
    "version": 2
  }
}