Pith Number

pith:WZPUDSXU

pith:2013:WZPUDSXUGWATIFCCNYCHVZMATU

not attested not anchored not stored refs pending

Using LDGM Codes and Sparse Syndromes to Achieve Digital Signatures

Davide Schipani, Franco Chiaraluce, Joachim Rosenthal, Marco Baldi, Marco Bianchi

arxiv:1305.5436 v1 · 2013-05-23 · cs.CR · 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{WZPUDSXUGWATIFCCNYCHVZMATU}

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	2026-05-18T03:25:04.761122Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b65f41caf435813414426e047ae5809d29da3c43140dd26ea63614ff6a4c0277

Aliases

arxiv: 1305.5436 · arxiv_version: 1305.5436v1 · doi: 10.48550/arxiv.1305.5436 · pith_short_12: WZPUDSXUGWAT · pith_short_16: WZPUDSXUGWATIFCC · pith_short_8: WZPUDSXU

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/WZPUDSXUGWATIFCCNYCHVZMATU \
  | 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: b65f41caf435813414426e047ae5809d29da3c43140dd26ea63614ff6a4c0277

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e7b3504a47a0c62015143f12fe6ca7ba22b2f8f8148967649fc3c9f81b241a6b",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2013-05-23T14:41:01Z",
    "title_canon_sha256": "e397604f09dad7227ccb0e75e369add1a49c5f2e5b3e72473274c1eddf72e284"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.5436",
    "kind": "arxiv",
    "version": 1
  }
}