Pith Number

pith:QJFWV3DR

pith:2026:QJFWV3DRQMCKWHOPFC6NSRTZVP

not attested not anchored not stored refs pending

The Observer World: A Cryptographic Extension of Impagliazzo's Five Worlds

Fabio F.G. Buono

arxiv:2606.27139 v1 · 2026-06-25 · cs.CR · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QJFWV3DRQMCKWHOPFC6NSRTZVP}

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	2026-06-26T01:16:11.323378Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

824b6aec718304ab1dcf28bcd94679abf85c2210f640b1dcb36e1f3986c3d99b

Aliases

arxiv: 2606.27139 · arxiv_version: 2606.27139v1 · doi: 10.48550/arxiv.2606.27139 · pith_short_12: QJFWV3DRQMCK · pith_short_16: QJFWV3DRQMCKWHOP · pith_short_8: QJFWV3DR

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/QJFWV3DRQMCKWHOPFC6NSRTZVP \
  | 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: 824b6aec718304ab1dcf28bcd94679abf85c2210f640b1dcb36e1f3986c3d99b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "96f6081b831e66fce011586d12392f5736ada9ba6432cafa73dd26c942d47460",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2026-06-25T15:13:44Z",
    "title_canon_sha256": "a36a00d177840e038be274dc5e574dff2eaf3e79335394065a8f147d6e477839"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.27139",
    "kind": "arxiv",
    "version": 1
  }
}