Pith Number

pith:SNDBYJOQ

pith:2009:SNDBYJOQWLXEQWFR4NX4T3I3UU

not attested not anchored not stored refs pending

Invertible Extractors and Wiretap Protocols

Amin Shokrollahi, Frederic Didier, Mahdi Cheraghchi

arxiv:0901.2120 v2 · 2009-01-14 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SNDBYJOQWLXEQWFR4NX4T3I3UU}

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	2026-05-18T04:17:03.596756Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93461c25d0b2ee4858b1e36fc9ed1ba5305805bb2aea1845daa95f1ca47efd5a

Aliases

arxiv: 0901.2120 · arxiv_version: 0901.2120v2 · doi: 10.48550/arxiv.0901.2120 · pith_short_12: SNDBYJOQWLXE · pith_short_16: SNDBYJOQWLXEQWFR · pith_short_8: SNDBYJOQ

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/SNDBYJOQWLXEQWFR4NX4T3I3UU \
  | 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: 93461c25d0b2ee4858b1e36fc9ed1ba5305805bb2aea1845daa95f1ca47efd5a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4594f6c2ef1eb54e9060191d5e18febee6d506104416faf30dd3036c3b6e7de",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2009-01-14T21:21:05Z",
    "title_canon_sha256": "6cb13596cc4479d9193ac2e31dee620155ee733c4242aa1b0c5fc458e3494cad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2120",
    "kind": "arxiv",
    "version": 2
  }
}