Pith Number

pith:WS7S2GJ2

pith:2011:WS7S2GJ24ULCV2P452M52SHGDI

not attested not anchored not stored refs pending

A Semantic Hierarchy for Erasure Policies

David Sands, Filippo Del Tedesco, Sebastian Hunt

arxiv:1109.6914 v1 · 2011-09-30 · 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{WS7S2GJ24ULCV2P452M52SHGDI}

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	2026-05-18T04:11:52.219850Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4bf2d193ae5162ae9fcee99dd48e61a2375b1472aa0ea9ee1e2e6fa67521af3

Aliases

arxiv: 1109.6914 · arxiv_version: 1109.6914v1 · doi: 10.48550/arxiv.1109.6914 · pith_short_12: WS7S2GJ24ULC · pith_short_16: WS7S2GJ24ULCV2P4 · pith_short_8: WS7S2GJ2

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/WS7S2GJ24ULCV2P452M52SHGDI \
  | 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: b4bf2d193ae5162ae9fcee99dd48e61a2375b1472aa0ea9ee1e2e6fa67521af3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f9969f433cd4866041943a9df213e205e2b13ad825f3a0083db7f7cdc538c67c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2011-09-30T17:53:46Z",
    "title_canon_sha256": "b2d280fed79fe7e46bfb3681c11588dc1c10cbe5c56a724920c74c63c964f540"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.6914",
    "kind": "arxiv",
    "version": 1
  }
}