Pith Number

pith:7A4ZPKOX

pith:2013:7A4ZPKOX7VFNYVJ7F2B3WVD577

not attested not anchored not stored refs pending

A Comparative Usability Study of Two-Factor Authentication

Emiliano De Cristofaro, Greg Norcie, Honglu Du, Julien Freudiger

arxiv:1309.5344 v2 · 2013-09-20 · cs.CR · 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{7A4ZPKOX7VFNYVJ7F2B3WVD577}

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	2026-05-18T03:00:36.995858Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f83997a9d7fd4adc553f2e83bb547dffe3a082921a103c781966b12fbd98a7b8

Aliases

arxiv: 1309.5344 · arxiv_version: 1309.5344v2 · doi: 10.48550/arxiv.1309.5344 · pith_short_12: 7A4ZPKOX7VFN · pith_short_16: 7A4ZPKOX7VFNYVJ7 · pith_short_8: 7A4ZPKOX

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/7A4ZPKOX7VFNYVJ7F2B3WVD577 \
  | 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: f83997a9d7fd4adc553f2e83bb547dffe3a082921a103c781966b12fbd98a7b8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8cfbba35f8eeb9169f68a8a9d2645683825abbca25ff2dc02e58252fe8f9f735",
    "cross_cats_sorted": [
      "cs.HC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2013-09-20T18:53:23Z",
    "title_canon_sha256": "4a02c0c91a94b05948e9d089b37cb861aaca2f5429818acd2f018d117b1ce2f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.5344",
    "kind": "arxiv",
    "version": 2
  }
}