Pith Number

pith:55WX2FBD

pith:2019:55WX2FBDBOQYAB2IWOJXNI6HRZ

not attested not anchored not stored refs pending

Umbrella: Enabling ISPs to Offer Readily Deployable and Privacy-Preserving DDoS Prevention Services

Min Zhu, Wei Ge, Yuan Cao, Zhuotao Liu

arxiv:1903.07796 v3 · 2019-03-19 · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{55WX2FBDBOQYAB2IWOJXNI6HRZ}

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	2026-05-17T23:49:14.443883Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef6d7d14230ba1800748b39376a3c78e56f11c7054df5245ba748067c458b1e4

Aliases

arxiv: 1903.07796 · arxiv_version: 1903.07796v3 · doi: 10.48550/arxiv.1903.07796 · pith_short_12: 55WX2FBDBOQY · pith_short_16: 55WX2FBDBOQYAB2I · pith_short_8: 55WX2FBD

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/55WX2FBDBOQYAB2IWOJXNI6HRZ \
  | 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: ef6d7d14230ba1800748b39376a3c78e56f11c7054df5245ba748067c458b1e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d73c1625ba4d6db46a3111faf2c624145517c9576331ce54aac0ef45aaa47207",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2019-03-19T02:24:39Z",
    "title_canon_sha256": "6a1f5acbec27bb0049d96812935fb8fb3f4f3673c9b2e2b38bf8d68ef440c5fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.07796",
    "kind": "arxiv",
    "version": 3
  }
}