Pith Number

pith:QFPYXKUG

pith:2015:QFPYXKUGCVS2I4ZVVX25UA2I3H

not attested not anchored not stored refs pending

An Empirical Study of Mobile Ad Targeting

Dan S. Wallach, Theodore Book

arxiv:1502.06577 v1 · 2015-02-23 · cs.CR · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QFPYXKUGCVS2I4ZVVX25UA2I3H}

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	2026-05-18T02:26:32.252878Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

815f8baa861565a47335adf5da0348d9ee9f93a1bbdbc58631a30c6aadb79c98

Aliases

arxiv: 1502.06577 · arxiv_version: 1502.06577v1 · doi: 10.48550/arxiv.1502.06577 · pith_short_12: QFPYXKUGCVS2 · pith_short_16: QFPYXKUGCVS2I4ZV · pith_short_8: QFPYXKUG

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/QFPYXKUGCVS2I4ZVVX25UA2I3H \
  | 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: 815f8baa861565a47335adf5da0348d9ee9f93a1bbdbc58631a30c6aadb79c98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c2e6168db891ea0b920961e504ee143989318cc4151019d597cc6362e5894e0",
    "cross_cats_sorted": [
      "cs.CY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2015-02-23T20:12:54Z",
    "title_canon_sha256": "5a906798aa42a9956e64a974a0166f7df683b8dc0fa53c8d976a5af3cb272b82"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.06577",
    "kind": "arxiv",
    "version": 1
  }
}