Pith Number

pith:QWHX3GE3

pith:2019:QWHX3GE362RVJ7PBINHK2DOXQC

not attested not anchored not stored refs pending

KeyForge: Mitigating Email Breaches with Forward-Forgeable Signatures

Matthew Green, Michael Specter, Sunoo Park

arxiv:1904.06425 v1 · 2019-04-12 · cs.CR · cs.CY · cs.NI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QWHX3GE362RVJ7PBINHK2DOXQC}

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	2026-05-17T23:48:41.400398Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

858f7d989bf6a354fde1434ead0dd7809871675972489ccdbaef1ab86bd25ef9

Aliases

arxiv: 1904.06425 · arxiv_version: 1904.06425v1 · doi: 10.48550/arxiv.1904.06425 · pith_short_12: QWHX3GE362RV · pith_short_16: QWHX3GE362RVJ7PB · pith_short_8: QWHX3GE3

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/QWHX3GE362RVJ7PBINHK2DOXQC \
  | 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: 858f7d989bf6a354fde1434ead0dd7809871675972489ccdbaef1ab86bd25ef9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "35f0b6f6206f71c55b4616038308154f07cf9621d237b96823f999739020d2d5",
    "cross_cats_sorted": [
      "cs.CY",
      "cs.NI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2019-04-12T21:29:37Z",
    "title_canon_sha256": "18bcb7e4787550116be3f269f2b92945ab188f219920f4d8faea25d915375271"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.06425",
    "kind": "arxiv",
    "version": 1
  }
}