Pith Number

pith:7E4WYOFN

pith:2011:7E4WYOFNRUSJBKCMO2JCCRWHBE

not attested not anchored not stored refs pending

On the Semantics of Purpose Requirements in Privacy Policies

Anupam Datta, Jeannette M. Wing, Michael Carl Tschantz

arxiv:1102.4326 v1 · 2011-02-21 · 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{7E4WYOFNRUSJBKCMO2JCCRWHBE}

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	2026-05-18T04:28:10.385688Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9396c38ad8d2490a84c76922146c7091c9faff8a1a88e4884cbc8e9f7f9a786

Aliases

arxiv: 1102.4326 · arxiv_version: 1102.4326v1 · doi: 10.48550/arxiv.1102.4326 · pith_short_12: 7E4WYOFNRUSJ · pith_short_16: 7E4WYOFNRUSJBKCM · pith_short_8: 7E4WYOFN

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/7E4WYOFNRUSJBKCMO2JCCRWHBE \
  | 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: f9396c38ad8d2490a84c76922146c7091c9faff8a1a88e4884cbc8e9f7f9a786

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4abaee7187b7735a29f60726fbb28b280712bf9daac816c886319f864cc3d900",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2011-02-21T20:51:02Z",
    "title_canon_sha256": "60dfa9146eb84c6860ebef77a04e824cbb4c5ac007f204dfe988482627d7920b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.4326",
    "kind": "arxiv",
    "version": 1
  }
}