Pith Number

pith:WRQINHTQ

pith:2026:WRQINHTQJSBFK2QZ7NDBYVLAZX

not attested not anchored not stored refs pending

SpanKey: Dynamic Key Space Conditioning for Neural Network Access Control

WenBin Yan

SpanKey gates neural network inference by conditioning activations on keys from a defined low-dimensional subspace.

arxiv:2604.12254 v2 · 2026-04-14 · cs.CR · cs.AI

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\usepackage{pith}
\pithnumber{WRQINHTQJSBFK2QZ7NDBYVLAZX}

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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.

Claims

C1strongest claim

Subspace key injection with multi-layer design, together with deny losses and margin-tail diagnostics, enables practical key-based gating of neural network inference, as demonstrated by CIFAR-10 ResNet-18 runs and MNIST ablations.

C2weakest assumption

That the network does not absorb the key signal into its weights in a way that collapses separation between valid and invalid keys at deployment scale, despite the analytical Beta-energy split and margin diagnostics provided.

C3one line summary

SpanKey injects keys from a learned subspace into network activations via additive or multiplicative maps to enable key-based access control for neural network inference.

Receipt and verification

First computed	2026-05-20T00:03:11.158193Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b460869e704c82556a19fb461c5560cdde6091c939444c956a43667f0cc2cb3b

Aliases

arxiv: 2604.12254 · arxiv_version: 2604.12254v2 · doi: 10.48550/arxiv.2604.12254 · pith_short_12: WRQINHTQJSBF · pith_short_16: WRQINHTQJSBFK2QZ · pith_short_8: WRQINHTQ

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/WRQINHTQJSBFK2QZ7NDBYVLAZX \
  | 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: b460869e704c82556a19fb461c5560cdde6091c939444c956a43667f0cc2cb3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f501051a18f26d8c65a0b78929e5b204998bee6b6bb6bf11e749990433694ffc",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2026-04-14T04:01:34Z",
    "title_canon_sha256": "c2e115dbdf0834b2c5db3dc7e4c6d2d63f85a3fcf3c1cf1d5034dea866930118"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.12254",
    "kind": "arxiv",
    "version": 2
  }
}