Pith Number

pith:BXBXELRU

pith:2018:BXBXELRUQLVLYTI32BN4P2ABQA

not attested not anchored not stored refs pending

DoubleEcho: Mitigating Context-Manipulation Attacks in Copresence Verification

Claudio Soriente, Hien Thi Thu Truong, Juhani Toivonen, N. Asokan, Sasu Tarkoma, Thien Duc Nguyen

arxiv:1803.07211 v3 · 2018-03-20 · 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{BXBXELRUQLVLYTI32BN4P2ABQA}

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	2026-05-17T23:53:51.531796Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0dc3722e3482eabc4d1bd05bc7e8018008d9a98e1a80a8a5415212a20cd29f93

Aliases

arxiv: 1803.07211 · arxiv_version: 1803.07211v3 · doi: 10.48550/arxiv.1803.07211 · pith_short_12: BXBXELRUQLVL · pith_short_16: BXBXELRUQLVLYTI3 · pith_short_8: BXBXELRU

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/BXBXELRUQLVLYTI32BN4P2ABQA \
  | 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: 0dc3722e3482eabc4d1bd05bc7e8018008d9a98e1a80a8a5415212a20cd29f93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1054fc6327660ad2cde5f345333eca7ac902e3621368f8058e1d47e30e2842ee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2018-03-20T01:19:07Z",
    "title_canon_sha256": "9692bdb32960c7bf3b377a0ea5068c6c9bbeb7de7afa5c3493ab81782a883c3a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.07211",
    "kind": "arxiv",
    "version": 3
  }
}