Pith Number

pith:X77XXFMZ

pith:2018:X77XXFMZMETNX6CY4U66GQDWIV

not attested not anchored not stored refs pending

Reducing Metadata Leakage from Encrypted Files and Communication with PURBs

Bryan Ford, Jean-Pierre Hubaux, Kirill Nikitin, Ludovic Barman, Matthew Underwood, Wouter Lueks

arxiv:1806.03160 v4 · 2018-06-08 · 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{X77XXFMZMETNX6CY4U66GQDWIV}

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	2026-05-17T23:39:37.160959Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bfff7b95996126dbf858e53de3407645618683a86da807aeab1ed0dd002f9adc

Aliases

arxiv: 1806.03160 · arxiv_version: 1806.03160v4 · doi: 10.48550/arxiv.1806.03160 · pith_short_12: X77XXFMZMETN · pith_short_16: X77XXFMZMETNX6CY · pith_short_8: X77XXFMZ

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/X77XXFMZMETNX6CY4U66GQDWIV \
  | 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: bfff7b95996126dbf858e53de3407645618683a86da807aeab1ed0dd002f9adc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94817ca57b6ecfce5269e72a1add7fffca79b367bab7e8c81ad5297aa188e8fe",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2018-06-08T14:01:23Z",
    "title_canon_sha256": "60aedcaa286a88fab1bec3806398f905b9d9f3ce0ffd2c6794fda612cb0272ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.03160",
    "kind": "arxiv",
    "version": 4
  }
}