Pith Number

pith:NFFQWWQV

pith:2021:NFFQWWQVZKOUAZ2NSUW36UQ2UJ

not attested not anchored not stored refs pending

Safer Illinois and RokWall: Privacy Preserving University Health Apps for COVID-19

Amit Agarwal, Andrew Miller, Christopher W. Fletcher, Churan He, Edward Richter, James Wei, Jinjun Xiong, Leihao Chen, Lijian Wang, Mohammad Behnia, Nicholas Chen, Qihao Wang, Ruihao Yao, Sanjay Patel, Vedant Agrawal, Vikram Sharma Mailthody, Wen-Mei Hwu

arxiv:2101.07897 v2 · 2021-01-19 · 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{NFFQWWQVZKOUAZ2NSUW36UQ2UJ}

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	2026-07-05T02:24:00.689734Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

694b0b5a15ca9d40674d952dbf521aa24cba94190ae5c3a44319bb567f68fef1

Aliases

arxiv: 2101.07897 · arxiv_version: 2101.07897v2 · doi: 10.48550/arxiv.2101.07897 · pith_short_12: NFFQWWQVZKOU · pith_short_16: NFFQWWQVZKOUAZ2N · pith_short_8: NFFQWWQV

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/NFFQWWQVZKOUAZ2NSUW36UQ2UJ \
  | 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: 694b0b5a15ca9d40674d952dbf521aa24cba94190ae5c3a44319bb567f68fef1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f9bb0499456246370b8402a48b0de51f1c249e3cbcf0950b4ba15d0692f7f88",
    "cross_cats_sorted": [
      "cs.CY"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2021-01-19T23:36:14Z",
    "title_canon_sha256": "5c553b043dab477f2866d40c1ba10294caa84271029f19848fb1649c475e9779"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.07897",
    "kind": "arxiv",
    "version": 2
  }
}