Pith Number

pith:XE5URABM

pith:2020:XE5URABMUKNO6N7475FRF7N746

not attested not anchored not stored refs pending

New Approaches for Quantum Copy-Protection

Jiahui Liu, Mark Zhandry, Qipeng Liu, Ruizhe Zhang, Scott Aaronson

arxiv:2004.09674 v7 · 2020-04-20 · cs.CR · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XE5URABMUKNO6N7475FRF7N746}

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	2026-07-05T01:43:25.225055Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b93b48802ca29aef37fcff4b12fdbfe78ede758b227f0c862c840925aa20d7f6

Aliases

arxiv: 2004.09674 · arxiv_version: 2004.09674v7 · doi: 10.48550/arxiv.2004.09674 · pith_short_12: XE5URABMUKNO · pith_short_16: XE5URABMUKNO6N74 · pith_short_8: XE5URABM

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/XE5URABMUKNO6N7475FRF7N746 \
  | 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: b93b48802ca29aef37fcff4b12fdbfe78ede758b227f0c862c840925aa20d7f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d46d9cc4b3167f37565a5c2509ed89de5d2533544b3af975b510e2dc2ce7773",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2020-04-20T23:30:17Z",
    "title_canon_sha256": "d3dc955268b0a8ca17180938ea7392346f0743e14473012f0f9f49e415bc1a79"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.09674",
    "kind": "arxiv",
    "version": 7
  }
}