Pith Number

pith:UUDA5MPA

pith:2019:UUDA5MPAQMEFXUYTA7KTUBYFXW

not attested not anchored not stored refs pending

XRD: Scalable Messaging System with Cryptographic Privacy

Albert Kwon, David Lu, Srinivas Devadas

arxiv:1901.04368 v1 · 2019-01-14 · 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{UUDA5MPAQMEFXUYTA7KTUBYFXW}

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	2026-05-17T23:56:25.717628Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a5060eb1e083085bd31307d53a0705bdb8a595ae264e6095e220175344545589

Aliases

arxiv: 1901.04368 · arxiv_version: 1901.04368v1 · doi: 10.48550/arxiv.1901.04368 · pith_short_12: UUDA5MPAQMEF · pith_short_16: UUDA5MPAQMEFXUYT · pith_short_8: UUDA5MPA

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/UUDA5MPAQMEFXUYTA7KTUBYFXW \
  | 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: a5060eb1e083085bd31307d53a0705bdb8a595ae264e6095e220175344545589

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4484c76efb439036ae75b5c8f031526a494527844d112d5c5bbda8c254e93531",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2019-01-14T16:02:21Z",
    "title_canon_sha256": "8c3a31d318fe1852ed27341ff8947b2ee000b3d0751f20d40cf0784f2ee0b665"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.04368",
    "kind": "arxiv",
    "version": 1
  }
}