Pith Number

pith:EJW6WZBE

pith:2008:EJW6WZBEHSHOEEVOJ6HIHCOCQF

not attested not anchored not stored refs pending

Security proof of differential phase shift quantum key distribution in the noiseless case

Chi-Hang Fred Fung, Guang-Can Guo, Yi-bo Zhao, Zheng-Fu Han

arxiv:0806.2000 v3 · 2008-06-12 · 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{EJW6WZBEHSHOEEVOJ6HIHCOCQF}

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	2026-07-04T15:15:27.068723Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

226deb64243c8ee212ae4f8e8389c2817dba5a107fc4f23bfa5504acbae4b569

Aliases

arxiv: 0806.2000 · arxiv_version: 0806.2000v3 · doi: 10.48550/arxiv.0806.2000 · pith_short_12: EJW6WZBEHSHO · pith_short_16: EJW6WZBEHSHOEEVO · pith_short_8: EJW6WZBE

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/EJW6WZBEHSHOEEVOJ6HIHCOCQF \
  | 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: 226deb64243c8ee212ae4f8e8389c2817dba5a107fc4f23bfa5504acbae4b569

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "23b7cf6d02c8163732b6be860e7f447fa0316dce48b1773b0083c222f1984230",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2008-06-12T13:10:14Z",
    "title_canon_sha256": "954368e990bf1fde73034c7d88400764ff575c90a62a084597639efa43e0f426"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.2000",
    "kind": "arxiv",
    "version": 3
  }
}