Pith Number

pith:LNFZZRR7

pith:2026:LNFZZRR7YXUMT25KAH5ECH2ZDA

not attested not anchored not stored refs pending

Prompts Don't Protect: Architectural Enforcement via MCP Proxy for LLM Tool Access Control

Rohith Uppala

arxiv:2605.18414 v1 · 2026-05-18 · cs.CR · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LNFZZRR7YXUMT25KAH5ECH2ZDA}

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	2026-05-20T00:05:59.547045Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5b4b9cc63fc5e8c9ebaa01fa411f59182ab77ee143f0a2143a5ec0ab29b03fed

Aliases

arxiv: 2605.18414 · arxiv_version: 2605.18414v1 · doi: 10.48550/arxiv.2605.18414 · pith_short_12: LNFZZRR7YXUM · pith_short_16: LNFZZRR7YXUMT25K · pith_short_8: LNFZZRR7

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/LNFZZRR7YXUMT25KAH5ECH2ZDA \
  | 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: 5b4b9cc63fc5e8c9ebaa01fa411f59182ab77ee143f0a2143a5ec0ab29b03fed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91ad68f2a6285654708237f2c0319961dd6af02b3492b9bc1df59f5427980d17",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2026-05-18T13:52:24Z",
    "title_canon_sha256": "7136df09a2ee53b6965578d26e00a2fae83013260b62b9c4fc98aa10c959c6ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.18414",
    "kind": "arxiv",
    "version": 1
  }
}