Pith Number

pith:UMLCSTEU

pith:2022:UMLCSTEUEDASJABSUAX4AI3PDU

not attested not anchored not stored refs pending

A Security & Privacy Analysis of US-based Contact Tracing Apps

Joydeep Mitra

arxiv:2207.08978 v2 · 2022-07-18 · cs.CR · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UMLCSTEUEDASJABSUAX4AI3PDU}

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	2026-07-05T04:42:09.691798Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a316294c9420c1248032a02fc0236f1d22f41eed6f6af287b1154689898cf2af

Aliases

arxiv: 2207.08978 · arxiv_version: 2207.08978v2 · doi: 10.48550/arxiv.2207.08978 · pith_short_12: UMLCSTEUEDAS · pith_short_16: UMLCSTEUEDASJABS · pith_short_8: UMLCSTEU

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/UMLCSTEUEDASJABSUAX4AI3PDU \
  | 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: a316294c9420c1248032a02fc0236f1d22f41eed6f6af287b1154689898cf2af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a54b0876c9a270de3a5d0c7acc8834f7a8fb51dca5c2499db7a23500d8ee073",
    "cross_cats_sorted": [
      "cs.CY"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2022-07-18T23:14:49Z",
    "title_canon_sha256": "bc128271e22e62ee081dbd53ed4962bcadfb8a4d53ea8f8af734ba64a375cf37"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2207.08978",
    "kind": "arxiv",
    "version": 2
  }
}