SuiPian (碎片)

Encode any file as plain text using invisible zero-width characters — looks perfectly normal, only the key can restore it.

How It Works

1. Compress: LZ4 compression of source file
2. Encrypt: AES-256-GCM with PBKDF2 key derivation (100k iterations)
3. Encode: Binary payload → zero-width characters (​‌U+200B / ​‌U+200C)
4. Append: Hidden data appended to carrier text end — output looks 100% normal

Undetectable: No special markers, no visible Base64, zero-width chars are invisible in most editors.

Features

• Hide: Encode any file (image, document, etc.) into a seemingly normal text file
• Reveal: Restore the original file from the disguised text using the password
• Validate: Check if a text file contains hidden data
• Info: Get metadata about hidden data

Requirements

• Python 3.10+
• lz4
• cryptography

Installation

pip install suipian

Or install from source:

pip install -e .

Quick Start

CLI

Hide a file (image → text):

suipian hide photo.png article.txt -o output.txt -p mypassword

Reveal a file (text → image):

suipian reveal output.txt -o restored.png -p mypassword

Validate hidden data:

suipian validate output.txt

Get hidden file info:

suipian info output.txt

Python API

from suipian import hide_file, reveal_file, validate_morph

result = hide_file(
    source="photo.png",
    carrier="article.txt",
    output="output.txt",
    password="secret"
)

result = reveal_file(
    morphed="output.txt",
    output="restored.png",
    password="secret"
)

result = validate_morph(file="output.txt")
print(result.success)
print(result.data)

Agent Integration

from suipian.tools import TOOLS, dispatch

Development

pip install -e ".[dev]"
pytest tests/test_unified_api.py -v

License

GPL-3.0