Pith Number

pith:YBR6YCMG

pith:2019:YBR6YCMG2FGDFKZWN6IYLOPRPT

not attested not anchored not stored refs pending

Universal Limitations on Quantum Key Distribution over a Network

Karol Horodecki, Marek Winczewski, Siddhartha Das, Stefan B\"auml

arxiv:1912.03646 v4 · 2019-12-08 · quant-ph · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YBR6YCMG2FGDFKZWN6IYLOPRPT}

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	2026-07-05T03:26:56.595898Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c063ec0986d14c32ab366f9185b9f17cd412846506f2f10fc284063fff01a132

Aliases

arxiv: 1912.03646 · arxiv_version: 1912.03646v4 · doi: 10.48550/arxiv.1912.03646 · pith_short_12: YBR6YCMG2FGD · pith_short_16: YBR6YCMG2FGDFKZW · pith_short_8: YBR6YCMG

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/YBR6YCMG2FGDFKZWN6IYLOPRPT \
  | 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: c063ec0986d14c32ab366f9185b9f17cd412846506f2f10fc284063fff01a132

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "562205da1ff266783ec4ab3d63cf6e433882289e1f2a8e3759724ca602ebfaa3",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-12-08T09:50:03Z",
    "title_canon_sha256": "94c546cd194d31703e8937c72867bf8ea6d7d993c220478154f57680b359594d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1912.03646",
    "kind": "arxiv",
    "version": 4
  }
}