Pith Number

pith:F72MW7SQ

pith:2010:F72MW7SQPSSTQEJJFWLXK6ZDEC

not attested not anchored not stored refs pending

Quantum Tagging: Authenticating Location via Quantum Information and Relativistic Signalling Constraints

Adrian Kent (Centre for Quantum Information, Astronomy, DAMTP, Foundations, Perimeter Institute), School of Physics, Timothy P. Spiller (Quantum Information Science, University of Cambridge, University of Leeds), William J. Munro (NTT Basic Research Laboratories)

arxiv:1008.2147 v6 · 2010-08-12 · quant-ph · cs.CR · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F72MW7SQPSSTQEJJFWLXK6ZDEC}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:23:47.904195Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ff4cb7e507ca53811292d97757b23208b613fa939b28e2595eae7b9b18fa53a

Aliases

arxiv: 1008.2147 · arxiv_version: 1008.2147v6 · doi: 10.48550/arxiv.1008.2147 · pith_short_12: F72MW7SQPSST · pith_short_16: F72MW7SQPSSTQEJJ · pith_short_8: F72MW7SQ

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/F72MW7SQPSSTQEJJFWLXK6ZDEC \
  | 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: 2ff4cb7e507ca53811292d97757b23208b613fa939b28e2595eae7b9b18fa53a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d1a7203823be1c9b4dc17ee99add1fb79ed348f9b85594112cf6cbb571d8e88",
    "cross_cats_sorted": [
      "cs.CR",
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2010-08-12T15:51:55Z",
    "title_canon_sha256": "6b6cae567e98ee3fcfa69c4e9bebaa071609aefe1d84fe9324a99e1f16f61fd8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.2147",
    "kind": "arxiv",
    "version": 6
  }
}