ShadowPhase 🎵🔒

A sophisticated audio steganography tool that uses phase coding techniques to hide encrypted text messages within audio files. ShadowPhase combines cryptographic security with advanced signal processing to provide a robust solution for covert communication.

🌟 Features

• Phase-based Steganography: Utilizes phase manipulation in the frequency domain to embed data imperceptibly
• AES Encryption: All hidden messages are encrypted using AES-256 in EAX mode before embedding
• Key-based Security: Uses password-derived keys for both encryption and pseudorandom frequency bin selection
• Audio Format Support: Works with WAV files (mono and stereo)
• Data Integrity: Includes CRC32 checksums to detect corruption or tampering
• Flexible Capacity: Automatically calculates embedding capacity based on audio length
• Robust Error Handling: Comprehensive validation and error reporting

🔧 Installation

Prerequisites

• Python 3.6+
• Required packages:

pip install numpy scipy pycryptodome

Clone the Repository

git clone https://github.com/kaizoku73/ShadowPhase.git
cd ShadowPhase

🚀 Usage

ShadowPhase provides a simple command-line interface for both embedding and extracting hidden messages.

Embedding a Message

python cli.py embed --in "Your secret message here" --cover input_audio.wav --key "your_secret_password"

Parameters:

• --in: The text message to hide (max 100 characters)
• --cover: Path to the cover audio file (WAV format)
• --key: Secret password for encryption and embedding

Output: Creates encoded.wav with the hidden message

Extracting a Message

python cli.py extract --stego encoded.wav --key "your_secret_password"

Parameters:

• --stego: Path to the audio file containing the hidden message
• --key: The same secret password used for embedding

🔬 How It Works

1. Message Preparation

• Input text is padded to 100 characters using white spaces
• Message is encrypted using AES-256 in EAX mode
• Length prefix and CRC32 checksum are added for integrity

2. Phase Encoding

• Audio is processed in blocks using FFT (Fast Fourier Transform)
• Frequency bins are selected pseudorandomly based on the key
• Phase values are modified: +π/2 for bit '1', -π/2 for bit '0'
• Mirror frequencies are adjusted to maintain audio quality

3. Audio Reconstruction

• Modified frequency domain data is converted back using IFFT
• Resulting audio maintains original characteristics while containing hidden data

4. Extraction Process

• Reverse FFT analysis extracts phase information
• Same pseudorandom sequence recovers embedded bits
• Decryption and integrity verification reveal the original message

What is Phase coding and how does it work?

For a detailed explanation of Phase coding steganography and how it works, check out this article: https://kaizoku.gitbook.io/steganography/phase-coding-in-audio

📊 Technical Specifications

• Encryption: AES-256 in EAX mode
• Hash Function: SHA-256 for key derivation
• Block Processing: Dynamic block sizing based on message length
• Capacity: 8 bits per audio block
• Audio Formats: 16-bit WAV files (mono/stereo)
• Message Limit: 100 characters maximum
• Integrity Check: CRC32 checksums

🎯 Advantages

• Imperceptible: Phase changes are inaudible to human ears
• Secure: Military-grade AES encryption protects message content
• Robust: Error detection and correction mechanisms
• Flexible: Works with various audio lengths and formats
• Pseudorandom: Key-based frequency selection prevents pattern detection

⚠️ Limitations

• Maximum message length: 100 characters
• Requires sufficient audio length for embedding capacity
• WAV format only (currently)
• Both embedding and extraction require the same secret key

🔐 Security Considerations

• Use strong, unique passwords for each hidden message
• The security relies on keeping the password secret
• Audio files may be subject to compression or conversion attacks
• Consider additional obfuscation techniques for highly sensitive data

📝 Example

# Embed a secret message
python cli.py embed --in "Meet me at midnight" --cover song.wav --key "MySecretKey123"
# Output: Successfully embedded the payload in encoded.wav file

# Extract the message
python cli.py extract --stego encoded.wav --key "MySecretKey123"
# Output: Meet me at midnight

🤝 Contributing

Contributions are welcome! Please feel free to submit issues, feature requests, or pull requests.

📜 License

This project is open source, feel free to use and modify it. Just don't forget to credit me if you share it!

⚖️ Disclaimer

This tool is for educational and research purposes. Users are responsible for complying with all applicable laws and regulations regarding encryption and steganography in their jurisdiction.

Support

If you encounter any issues or have questions, please open an issue on GitHub.

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ShadowPhase - Where secrets hide in plain sound 🎵

Made by Kaizoku