A simple GUI for steganography: hide and reveal secret messages in images, with optional AES-256-GCM encryption and Argon2id key derivation.

Built as a replacement for Steganozorus © 2002 – Thomas Nerrant.

If you find this project useful, consider buying me a coffee.

• Hide and reveal messages in image files using LSB or EXIF steganography
• AES-256-GCM encryption with Argon2id key derivation from a shared secret
• Plain text mode to hide a message without encryption (useful for testing or low-risk payloads)
• Desktop GUI built with PyQt6

When hiding text, the output file is saved next to the source image with a _hidden suffix (for example, photo.png → photo_hidden.png).

• Python 3.13
• uv (recommended) or pip
• just (optional, for recipe commands)

First-time setup (creates a virtual environment with the Python version from .python-version):

just init
just install

Or with uv directly:

uv sync

just run

Or:

uv run -m app

1. Choose Hide or Reveal mode.
2. Enter the text to hide, or leave the field empty in reveal mode.
3. Enter a shared secret (at least 8 characters), or enable plain text mode to skip encryption.
4. Select a cover image and run the action.

Common tasks via just:

just test      # run pytest
just format    # lint and format with ruff
just typing    # type-check with pyright
just ci        # full local CI pipeline

List all recipes with just --list.

• Choose output file name
• Add support for more encryption algorithms
• Add support for keyfiles
• Audio and video support, drag & drop
• Deniability support
• More languages
• Binary release
• Design improvements

MIT

KisSCoOl