Stego-App

Windows Steganography App

About

Stego App allows you to embed hidden messages into 2D digital images securely.

Data Protection

The embedded data is protected using a combination of spiral traversal patterns (Corner, Direction, Depth), AES-based encryption, and compression.
This makes the hidden data very hard to detect or extract without authorization.

• Corner: Defines the starting point of embedding: Top-Left (A), Top-Right (B), Bottom-Right (C), Bottom-Left (D).
• Direction: Spiral rotation (Clockwise or Counter-Clockwise)
• Depth: Value 0 or 1 specifies whether embedding starts from the center or from the image edges.
• Compression: Compression serves two purposes:
  • General purpose: reduce the data size before embedding.
  • Security enhancement: once applied, extraction without the correct decryption key will not produce any valid output.
• Encryption (confidential): Final protection uses user-provided password and AES key size. The larger the key, the more random and secure the result becomes.

Analysis & Logging

The app records spiral coordinate traversal and common errors into a log file.
If you encounter errors or bugs, please report them via email: hersaputrayoda@gmail.com or GitHub Issues.

---

Supported Image Formats

✅ Lossless (read & write): PNG, BMP (24-bit), TIF, TIFF
⚠️ Lossy (JPEG/JPG): Supported for reading & embedding, but cannot be saved back to lossy format because compression alters LSB data. Always save as PNG/BMP/TIFF after embedding.

Supported Bit Depths

Bit Depth	Supported Modes	Channels
8-bit	Grayscale	1
16-bit	Grayscale, RGB, RGBA	1/3/4
24-bit	RGB	3
32-bit	RGBA	4

---

Capacity Estimation

The app estimates how much data can be embedded based on image dimensions and channels.
Some metadata overhead is reserved: flag (4 bit), length (32 bit), CRC (32 bit).

Example:

Width	Height	Channels	Raw Capacity (bits)	Final Capacity (after overhead)
10	10	3	300	232 bits (29 bytes)
5000	5000	4	100,000,000	99,999,932 bits (~12.50 MB)
16000	16000	4	1,024,000,000	1,023,999,932 bits (~122 MB)

Maximum capacity:
The length header uses 4 bytes (32-bit), meaning the maximum storable size is:
0xFFFFFFFF = 4,294,967,295 bytes (~4 GB).

---

System Requirements

• Tested on: Windows 10 (64-bit)
• Minimum RAM: 4 GB (8 GB recommended for large images)

---

Download & Run

1. Go to Releases
2. Download the latest .exe build
3. Run the application directly — no installation required

---

Video Guide

YouTube Tutorial

---

Built With

• Python 3.10 (64-bit)
• imageio
• numpy
• PySide6
• PyInstaller (for packaging)

---

License

This project is licensed under the MIT License – see the LICENSE file for details.

---

Support

☕ If you like this project, you can support me:

• PayPal
• Saweria

---