Pith Number

pith:GLMV6YPP

pith:2013:GLMV6YPPEJDDTUB2XSDF43YQCV

not attested not anchored not stored refs pending

Against Spyware Using CAPTCHA in Graphical Password Scheme

Haichang Gao, Liming Wang, Uwe Aickelin, Xiuling Chang, Xiyang Liu, Zhongjie Ren

arxiv:1305.7485 v1 · 2013-05-31 · 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{GLMV6YPPEJDDTUB2XSDF43YQCV}

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	2026-05-18T00:57:56.356488Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32d95f61ef224639d03abc865e6f101557128b844521e4db030a4bf25e6f5d58

Aliases

arxiv: 1305.7485 · arxiv_version: 1305.7485v1 · doi: 10.48550/arxiv.1305.7485 · pith_short_12: GLMV6YPPEJDD · pith_short_16: GLMV6YPPEJDDTUB2 · pith_short_8: GLMV6YPP

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/GLMV6YPPEJDDTUB2XSDF43YQCV \
  | 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: 32d95f61ef224639d03abc865e6f101557128b844521e4db030a4bf25e6f5d58

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "57d2ad46feeff432547e5951e3a6939cf82212c33d87f6351abc9d9945945a62",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2013-05-31T16:50:54Z",
    "title_canon_sha256": "352ed8085ed50976fc403d027280f39a10cdf1c79bc042a4e9945af023f5b5e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.7485",
    "kind": "arxiv",
    "version": 1
  }
}