Pith Number

pith:IUPTOI3N

pith:2018:IUPTOI3NVIQJT5DCIDH6K66RC6

not attested not anchored not stored refs pending

Face Flashing: a Secure Liveness Detection Protocol based on Light Reflections

Di Tang, Kehuan Zhang, Yinqian Zhang, Zhe Zhou

arxiv:1801.01949 v2 · 2018-01-06 · cs.CV · 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{IUPTOI3NVIQJT5DCIDH6K66RC6}

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	2026-05-18T00:07:32.846633Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

451f37236daa2099f46240cfe57bd1178f80ca55bc20a42beeedca0d3a8bd3b7

Aliases

arxiv: 1801.01949 · arxiv_version: 1801.01949v2 · doi: 10.48550/arxiv.1801.01949 · pith_short_12: IUPTOI3NVIQJ · pith_short_16: IUPTOI3NVIQJT5DC · pith_short_8: IUPTOI3N

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/IUPTOI3NVIQJT5DCIDH6K66RC6 \
  | 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: 451f37236daa2099f46240cfe57bd1178f80ca55bc20a42beeedca0d3a8bd3b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "86dd5808e7ef37231298b95c769c16603e9f8e2ab20f5064da44ce78cb505047",
    "cross_cats_sorted": [
      "cs.CR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2018-01-06T00:41:10Z",
    "title_canon_sha256": "620ec5cd3d0e1a1b31ff725de0b0f332afd20ca7fd131ca2bced107181ed3c02"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.01949",
    "kind": "arxiv",
    "version": 2
  }
}