Pith Number

pith:4AYCHVTA

pith:2008:4AYCHVTA5J4UDPPOQSCZC2MGNM

not attested not anchored not stored refs pending

Megabits secure key rate quantum key distribution

H. Kamada, H. Takesue, K. Wen, M. Asobe, M. Suyama, O. Tadanaga, Q. Zhang, T. Hirohata, T. Honjo, Y. Nishida, Y. Takiguchi, Y. Tokura, Y. Yamamoto

arxiv:0809.4018 v1 · 2008-09-23 · 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{4AYCHVTA5J4UDPPOQSCZC2MGNM}

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	2026-05-18T02:15:33.918311Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e03023d660ea7941bdee84859169866b0319e2b862f3d635d09e162e47897cf0

Aliases

arxiv: 0809.4018 · arxiv_version: 0809.4018v1 · doi: 10.48550/arxiv.0809.4018 · pith_short_12: 4AYCHVTA5J4U · pith_short_16: 4AYCHVTA5J4UDPPO · pith_short_8: 4AYCHVTA

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/4AYCHVTA5J4UDPPOQSCZC2MGNM \
  | 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: e03023d660ea7941bdee84859169866b0319e2b862f3d635d09e162e47897cf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5a6907995d1f9b6b1376e66a34350e796dc3f3371f546128dd22d5d30223870",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2008-09-23T20:43:18Z",
    "title_canon_sha256": "020f525388af98962dcc240db2889ad0a2a9921a3d6befbcc7932235e2dcdd24"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.4018",
    "kind": "arxiv",
    "version": 1
  }
}