Fillie – Secure, Cross-Platform File Sharing

Fillie is a one-stop solution for seamless and secure file sharing across platforms. It allows users to upload, slice, optionally encrypt, and share files in a custom .fillie format. All shared content is indexed in a centralized JSON registry, making it simple to browse and download with full integrity verification.

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✨ Features

• Cross-platform compatibility.
• Optional end-to-end encryption for private file sharing.
• Full integrity verification using SHA256 checksums.
• Centralized JSON index for content discovery.
• Smart file slicing (≤100MB per piece) for reliable hosting.
• Scalable hosting support: GitHub, IPFS, cloud storage.

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🚀 Objectives

• Provide safe and simple file sharing across all systems.
• Support optional encryption for privacy and restricted access.
• Maintain content integrity through cryptographic security.
• Enable a centralized, searchable index for all uploads.

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⚙️ How It Works

Uploading Files with Fillie Uploader

1. User selects a local file (e.g., MyDanceVideo.mp3).
2. Fillie slices the file into .fillie chunks (100MB or less).
3. Optionally encrypts each slice.
4. Randomizes filenames for security.
5. Uploads slices to hosting (e.g., GitHub).
6. Updates the server JSON index with metadata:
   • File ID
   • Slice count
   • URLs of all slices
   • Encryption status
   • SHA256 checksum

Flowchart

flowchart LR
    A[Select Native File] --> B[Slice File into Pieces]
    B --> C{Encrypt?}
    C -- Yes --> D[Encrypt Each Slice]
    C -- No --> E[Keep as-is]
    D --> F[Rename Slices to Random .fillie]
    E --> F
    F --> G[Upload Slices to Host]
    G --> H[Update Server JSON Index]

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Downloading Files with Fillie Downloader

1. User opens the Fillie Downloader.
2. Fetches the server JSON index.
3. Chooses a file to download.
4. Retrieves all .fillie slices.
5. Verifies each slice with a SHA256 checksum.
6. Decrypts slices (if required).
7. Reconstructs the original file seamlessly.

Flowchart

flowchart LR
    A[Open Downloader] --> B[Fetch Server JSON]
    B --> C[Select File to Download]
    C --> D[Download All .fillie Slices]
    D --> E[Verify SHA256 Checksum]
    E --> F{Encrypted?}
    F -- Yes --> G[Decrypt Slices]
    F -- No --> H[Keep Slices as-is]
    G --> I[Reconstruct Original File]
    H --> I

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📂 Applications

Fillie Uploader

• Slice files into manageable chunks.
• Optional file encryption for privacy.
• Upload to hosting service.
• Auto-update the JSON registry.

Fillie Downloader

• Browse files via index.
• Download and verify integrity.
• Decrypt files when needed.
• Reconstruct and restore original file.

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✅ Advantages

• Flexible optional encryption.
• Designed for cross-platform compatibility.
• Integrity verification prevents tampering.
• Universal JSON index for download/browsing.
• Slices make the system scalable and GitHub-friendly.

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🔮 Future Enhancements

• Migrate hosting from GitHub to IPFS, AWS S3, or GCP for large-scale needs.
• Introduce database or paginated JSON for scalability.
• Add CLI tools for power users.
• Implement search, filters, and tags in the downloader app.
• Introduce versioned .fillie support for backward compatibility.
• Explore P2P + decentralized sharing beyond centralized hosting.

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