Pith Number

pith:NHSSDLNI

pith:2016:NHSSDLNIQFUFKTX7HOPY5GXKMX

not attested not anchored not stored refs pending

Four-Dimensional Usability Investigation of Image CAPTCHA

Junnan Yu, Ting Han, Xuna Ma

arxiv:1612.01067 v1 · 2016-12-04 · cs.HC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NHSSDLNIQFUFKTX7HOPY5GXKMX}

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	2026-05-18T00:55:53.438040Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69e521ada88168554eff3b9f8e9aea65c5dd50ebb6534f1d305af74b66d4753a

Aliases

arxiv: 1612.01067 · arxiv_version: 1612.01067v1 · doi: 10.48550/arxiv.1612.01067 · pith_short_12: NHSSDLNIQFUF · pith_short_16: NHSSDLNIQFUFKTX7 · pith_short_8: NHSSDLNI

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/NHSSDLNIQFUFKTX7HOPY5GXKMX \
  | 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: 69e521ada88168554eff3b9f8e9aea65c5dd50ebb6534f1d305af74b66d4753a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea75797990e455118969aef2838ea1568e685f258d46990a0c51a46787f875d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.HC",
    "submitted_at": "2016-12-04T05:18:53Z",
    "title_canon_sha256": "57da36fcbd4a1c4f2243b47aec401048df0f5cb59546b81674ecf0168bdc8614"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.01067",
    "kind": "arxiv",
    "version": 1
  }
}