Pith Number

pith:42HHNAPQ

pith:2014:42HHNAPQBOYR35SJHL72E35MI2

not attested not anchored not stored refs pending

A CCA secure cryptosystem using matrices over group rings

Charalambos Koupparis, Delaram Kahrobaei, Vladimir Shpilrain

arxiv:1403.3660 v1 · 2014-03-14 · cs.CR · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{42HHNAPQBOYR35SJHL72E35MI2}

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	2026-05-18T02:56:19.757745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e68e7681f00bb11df6493affa26fac468b59f03296431eab58d548bbc938e066

Aliases

arxiv: 1403.3660 · arxiv_version: 1403.3660v1 · doi: 10.48550/arxiv.1403.3660 · pith_short_12: 42HHNAPQBOYR · pith_short_16: 42HHNAPQBOYR35SJ · pith_short_8: 42HHNAPQ

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/42HHNAPQBOYR35SJHL72E35MI2 \
  | 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: e68e7681f00bb11df6493affa26fac468b59f03296431eab58d548bbc938e066

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d19b0aa1864774218889f2dd4cf9e81ad266307a53b84d35c1ccb213ae49da82",
    "cross_cats_sorted": [
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2014-03-14T18:14:40Z",
    "title_canon_sha256": "8dfb7a9f91f862809ded47e49d32acaa25feb5eb5a6a0007b1a6146ed71d0f1e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.3660",
    "kind": "arxiv",
    "version": 1
  }
}