Pith Number

pith:SIUJGCWZ

pith:2026:SIUJGCWZ22LD77TRHUHGX6XKP3

not attested not anchored not stored refs pending

A Usable and Secure Bengali CAPTCHA

Farida Chowdhury, Md Hasibur Rahman, Md Neyamul Islam Shibbir, Md Sadek Ferdous

arxiv:2606.29077 v1 · 2026-06-27 · 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{SIUJGCWZ22LD77TRHUHGX6XKP3}

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	2026-06-30T01:17:51.881706Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9228930ad9d6963ffe713d0e6bfaea7ed1b9e26b01400d009594f1e7e6fb0846

Aliases

arxiv: 2606.29077 · arxiv_version: 2606.29077v1 · doi: 10.48550/arxiv.2606.29077 · pith_short_12: SIUJGCWZ22LD · pith_short_16: SIUJGCWZ22LD77TR · pith_short_8: SIUJGCWZ

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/SIUJGCWZ22LD77TRHUHGX6XKP3 \
  | 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: 9228930ad9d6963ffe713d0e6bfaea7ed1b9e26b01400d009594f1e7e6fb0846

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "837aff5fd2abbd7c05709daa264a05ee028a26b736df838588d692c97c059ebb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2026-06-27T20:31:13Z",
    "title_canon_sha256": "2806ce02794b69e222b45df8cc217defe63bfb445a5a5ac46eb372fb5873206a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.29077",
    "kind": "arxiv",
    "version": 1
  }
}