Add Gradio web interface with LSB steganography

- Add steg_embedder.py: LSB steganography embedding/extraction with encryption
- Add app.py: Gradio interface with 3 tabs (Hide Data, Detect/Extract, Check Corruption)
- Update requirements.txt: Add Gradio dependency
- Add GitHub Actions workflow for auto-sync to Hugging Face Spaces
- Add README_SPACE.md: Hugging Face Space documentation

Features:
- Hide text in images using LSB technique with optional password encryption
- Extract hidden data from steganographic images
- Detect steganography using RAT Finder analysis (ELA, LSB, histogram, metadata)
- Validate image integrity and check for corruption

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ricyoung

.github/workflows/sync-to-hf.yml

@@ -0,0 +1,36 @@
+name: Sync to Hugging Face Spaces
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'app.py'
+      - 'steg_embedder.py'
+      - 'rat_finder.py'
+      - 'find_bad_images.py'
+      - 'requirements.txt'
+      - 'README.md'
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          lfs: true
+
+      - name: Push to Hugging Face Space
+        env:
+          HF_TOKEN: ${{ secrets.HF_TOKEN }}
+        run: |
+          git config --global user.email "noreply@deepneuro.ai"
+          git config --global user.name "DeepNeuro AI Bot"
+
+          # Add Hugging Face remote
+          git remote add space https://richardyoung:$HF_TOKEN@huggingface.co/spaces/richardyoung/2pac || true
+
+          # Force push to Hugging Face Space
+          git push space main --force

README_SPACE.md

@@ -0,0 +1,106 @@
+---
+title: 2PAC Picture Analyzer & Corruption Killer
+emoji: 🔫
+colorFrom: purple
+colorTo: blue
+sdk: gradio
+sdk_version: 4.44.0
+app_file: app.py
+pinned: false
+license: mit
+---
+
+# 🔫 2PAC: Picture Analyzer & Corruption Killer
+
+**Advanced image security and steganography toolkit**
+
+## Features
+
+### 🔒 Hide Secret Data
+Invisibly hide text messages inside images using **LSB (Least Significant Bit) steganography**:
+- Hide text of any length (capacity depends on image size)
+- Optional password encryption for added security
+- Adjustable LSB depth (1-4 bits per channel)
+- PNG output preserves hidden data perfectly
+
+### 🔍 Detect & Extract Hidden Data
+Advanced steganography detection using **RAT Finder** technology:
+- **ELA (Error Level Analysis)** - Highlights compression artifacts
+- **LSB Analysis** - Detects randomness in least significant bits
+- **Histogram Analysis** - Finds statistical anomalies
+- **Metadata Inspection** - Checks EXIF data for suspicious tools
+- **Extract Data** - Recover messages hidden with this tool
+
+### 🛡️ Check Image Integrity
+Comprehensive image validation and corruption detection:
+- File format validation (JPEG, PNG, GIF, TIFF, BMP, WebP, HEIC)
+- Header integrity checks
+- Data completeness verification
+- Visual corruption detection (black/gray regions)
+- Structure validation
+
+## How It Works
+
+### LSB Steganography
+The tool hides data in the **least significant bits** of pixel values. Since changing the last 1-2 bits of a pixel value (e.g., changing 200 to 201) is imperceptible to the human eye, we can encode arbitrary data without visible changes to the image.
+
+**Example:**
+- Original pixel: RGB(156, 89, 201) = `10011100, 01011001, 11001001`
+- After hiding bit '1': RGB(156, 89, 201) = `10011100, 01011001, 11001001` (last bit already 1)
+- After hiding bit '0': RGB(156, 88, 201) = `10011100, 01011000, 11001001` (89→88)
+
+This allows hiding hundreds to thousands of bytes in a typical photo!
+
+### Steganography Detection
+The RAT Finder uses multiple forensic techniques:
+
+1. **ELA (Error Level Analysis)**: Re-saves the image at a known quality and compares compression artifacts. Hidden data or manipulation shows as bright areas.
+
+2. **LSB Analysis**: Statistical tests check if the least significant bits are too random (hidden data) or too uniform (natural image).
+
+3. **Histogram Analysis**: Analyzes color distribution for anomalies typical of steganography.
+
+4. **Metadata Forensics**: Checks EXIF data for steganography tools or suspicious editing history.
+
+## Usage Tips
+
+### For Hiding Data:
+- ✅ Use **PNG** images (JPEG compression destroys hidden data)
+- ✅ Larger images = more capacity
+- ✅ Use 1-2 bits per channel for undetectable hiding
+- ✅ Add password encryption for sensitive data
+- ⚠️ Don't re-save or edit the output image!
+
+### For Detection:
+- 🔍 Higher sensitivity = more thorough but more false positives
+- 📊 Check the ELA image for bright spots (potential hiding)
+- 💡 High confidence doesn't guarantee hidden data (could be compression artifacts)
+- 🔓 Use "Extract Data" tab if you suspect LSB steganography
+
+### For Corruption Checking:
+- 🛡️ Enable visual corruption check for damaged photos
+- ⚙️ Higher sensitivity for stricter validation
+- 📁 Useful before archiving important photo collections
+
+## About
+
+**2PAC** combines three powerful tools:
+- **LSB Steganography** engine (new!)
+- **RAT Finder** - Advanced steg detection
+- **Image Validator** - Corruption checker
+
+Created by [Richard Young](https://github.com/ricyoung) | Part of [DeepNeuro.AI](https://deepneuro.ai)
+
+🔗 **GitHub Repository:** [github.com/ricyoung/2pac](https://github.com/ricyoung/2pac)
+🌐 **More Tools:** [demo.deepneuro.ai](https://demo.deepneuro.ai)
+
+## Security & Privacy
+
+- ✅ All processing happens in your browser session (Hugging Face Space)
+- ✅ Images are not stored or logged
+- ✅ Temporary files are deleted after processing
+- ✅ Your hidden data and passwords are never saved
+
+---
+
+*"All Eyez On Your Images" 👁️*