Pith Number

pith:Q55OKKXW

pith:2010:Q55OKKXW6734THEES6YAD2CWFZ

not attested not anchored not stored refs pending

Towards Improving the NIST Fingerprint Image Quality (NFIQ) Algorithm (Extended Version)

Johannes Merkle, Kristina Elwart, Marco Breitenstein, Markus Nuppeney, Michael Schwaiger, Oliver Bausinger

arxiv:1008.0781 v2 · 2010-08-04 · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q55OKKXW6734THEES6YAD2CWFZ}

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	2026-05-18T04:42:03.195214Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

877ae52af6f7f7c99c8497b001e8562e42ba748d58e46edbaa09fd6de46bf6b6

Aliases

arxiv: 1008.0781 · arxiv_version: 1008.0781v2 · doi: 10.48550/arxiv.1008.0781 · pith_short_12: Q55OKKXW6734 · pith_short_16: Q55OKKXW6734THEE · pith_short_8: Q55OKKXW

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/Q55OKKXW6734THEES6YAD2CWFZ \
  | 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: 877ae52af6f7f7c99c8497b001e8562e42ba748d58e46edbaa09fd6de46bf6b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fca46c2c819a506016cb0797397a94bc8db78a8c0438bb4fec56926353dfa3f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2010-08-04T14:02:05Z",
    "title_canon_sha256": "3fceb7e715902f3ff3986dd78bd7ebaa0cbade03c1104c4a0567da7e98701f69"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.0781",
    "kind": "arxiv",
    "version": 2
  }
}