Pith Number

pith:PCPQ5SL4

pith:2015:PCPQ5SL4GZIM5DVPP5RKYIYYKL

not attested not anchored not stored refs pending

Spacetime-constrained oblivious transfer

Dami\'an Pital\'ua-Garc\'ia

arxiv:1512.05649 v2 · 2015-12-17 · 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{PCPQ5SL4GZIM5DVPP5RKYIYYKL}

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	2026-05-18T01:11:38.547412Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

789f0ec97c3650ce8eaf7f62ac231852d406a48d6ae61fb2c5b433d284de0b5b

Aliases

arxiv: 1512.05649 · arxiv_version: 1512.05649v2 · doi: 10.48550/arxiv.1512.05649 · pith_short_12: PCPQ5SL4GZIM · pith_short_16: PCPQ5SL4GZIM5DVP · pith_short_8: PCPQ5SL4

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/PCPQ5SL4GZIM5DVPP5RKYIYYKL \
  | 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: 789f0ec97c3650ce8eaf7f62ac231852d406a48d6ae61fb2c5b433d284de0b5b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca89f1722c5d6257aa8321c9c8db786ab658ddccf44c2346a6e2db1b1d7ce157",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-12-17T16:06:01Z",
    "title_canon_sha256": "18bd6f5ff6d7703eeccb7fe9eeec280299dde960e86c4f8b9b480aca17e21029"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.05649",
    "kind": "arxiv",
    "version": 2
  }
}