Pith Number

pith:WMN4YQ2S

pith:2019:WMN4YQ2S2AWBAIRBN4E7VB747S

not attested not anchored not stored refs pending

Understanding the Effectiveness of Ultrasonic Microphone Jammer

Ben Y. Zhao, Haitao Zheng, Huiying Li, Pedro Lopes, Steven Nagels, Yuxin Chen, Zhijing Li

arxiv:1904.08490 v1 · 2019-04-17 · cs.CR · cs.HC · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WMN4YQ2S2AWBAIRBN4E7VB747S}

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	2026-05-17T23:48:14.017166Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b31bcc4352d02c1022216f09fa87fcfc986933a3edf40d3958b752d63e704a33

Aliases

arxiv: 1904.08490 · arxiv_version: 1904.08490v1 · doi: 10.48550/arxiv.1904.08490 · pith_short_12: WMN4YQ2S2AWB · pith_short_16: WMN4YQ2S2AWBAIRB · pith_short_8: WMN4YQ2S

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/WMN4YQ2S2AWBAIRBN4E7VB747S \
  | 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: b31bcc4352d02c1022216f09fa87fcfc986933a3edf40d3958b752d63e704a33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54b00574124475a78c91d9a740d6887acb487268f756a25378dc5d2bc9d3ce33",
    "cross_cats_sorted": [
      "cs.HC",
      "eess.SP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2019-04-17T20:41:39Z",
    "title_canon_sha256": "0b1a91b22d3a854a540d2b26e2a46cfcd1a054a6a1cee3b09967fb534c918e19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.08490",
    "kind": "arxiv",
    "version": 1
  }
}