Pith Number

pith:2VV77AC4

pith:2018:2VV77AC4VIYUWF6JK4BY3BPJ5N

not attested not anchored not stored refs pending

Towards practical key exchange from ordinary isogeny graphs

Benjamin Smith (GRACE), IMB), Jean Kieffer (Inria, Luca De Feo (LIX)

arxiv:1809.07543 v1 · 2018-09-20 · cs.CR · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2VV77AC4VIYUWF6JK4BY3BPJ5N}

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	2026-05-18T00:05:15.962218Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d56bff805caa314b17c957038d85e9eb5b0d8736cd9f27d5763b8dd0feb7c634

Aliases

arxiv: 1809.07543 · arxiv_version: 1809.07543v1 · doi: 10.48550/arxiv.1809.07543 · pith_short_12: 2VV77AC4VIYU · pith_short_16: 2VV77AC4VIYUWF6J · pith_short_8: 2VV77AC4

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/2VV77AC4VIYUWF6JK4BY3BPJ5N \
  | 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: d56bff805caa314b17c957038d85e9eb5b0d8736cd9f27d5763b8dd0feb7c634

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1649ea58e9c84066981854e1ba6e5dd4ec396c727033b920d0a73343df990e2f",
    "cross_cats_sorted": [
      "math.NT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2018-09-20T09:20:48Z",
    "title_canon_sha256": "6f102a2f902368db354546e1983ea7deaad069d53f3843aca1a3299b4dbafbb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.07543",
    "kind": "arxiv",
    "version": 1
  }
}