Custom Node Proposal: SaveImageSiliconSignature + VerifySiliconSignature — ASIC-Bound Image Authentication

Hi @comfyanonymous,

ComfyUI's node-based architecture is perfect for adding a **hardware-bound watermarking node**. I have a project that fits naturally into your ecosystem.

## SiliconSignature — ASIC-Based Image Authentication

We use **ASIC miners** (Antminer S9 BM1387) to generate proof-of-work nonces, then embed them via Reed-Solomon LSB watermarking.

## Proposed Integration: Custom Node

**New node: `SaveImageSiliconSignature`**

```
[VAEDecode] → [SaveImageSiliconSignature] → [PreviewImage]
│
├── image (IMAGE) ← from VAE
├── asic_device (STRING) ← "/dev/ttyUSB0"
├── redundancy (INT) ← 5
├── metadata_json (STRING) ← {"prompt": "...", "seed": 42}
└── include_workflow (BOOLEAN) ← True
```

**Node outputs:**
- `image` — Watermarked image (visually identical)
- `signature_hash` — SHA-256 for blockchain/logging
- `asic_id` — Hardware identifier
- `integrity_score` — Reed-Solomon health check

**Verification node:**
```
[LoadImage] → [VerifySiliconSignature]
│
└── verify_result (STRING)
→ "✅ Signed by ComfyUI-ASIC-0x7a3f... | Integrity: FULL"
```

## Why This Fits ComfyUI

| Feature | Current ComfyUI | + SiliconSignature |
|---------|-----------------|-------------------|
| **Workflow provenance** | JSON in PNG | **+ ASIC-bound proof** |
| **Node composability** | ✅ Yes | ✅ Watermark as a node |
| **Batch processing** | ✅ Yes | ✅ Sign every image in batch |
| **Tamper detection** | ❌ No | ✅ Syndrome per pixel |
| **Offline verify** | ❌ Needs ComfyUI | ✅ Pure Python anywhere |

## Installation

```bash
# Via ComfyUI Manager (if accepted)
comfy node registry-install comfyui-siliconsignature

# Manual
cd ComfyUI/custom_nodes
git clone https://github.com/Agnuxo1/comfyui-siliconsignature.git
```

## Technical Details

- **ASIC**: SHA-256 on Antminer S9 BM1387 (or $30 USB stick)
- **Watermark**: Reed-Solomon GF(2^8), configurable redundancy
- **Embed**: LSB in PNG (preserves ComfyUI's PNG workflow)
- **Verify**: Offline Python, zero dependencies
- **Forge barrier**: Physical ASIC required ($10,000+)
- **Repo**: https://github.com/Agnuxo1/Secure_image_generation_with_ASIC_signature

## Author

Francisco Angulo de Lafuente (@Agnuxo1) — independent researcher, 35 years

Would you be open to a **custom node** for hardware-bound image authentication in ComfyUI?

— Francisco