🖼️ steganography - Image Steganography in Rust

steganography (formerly cryimg) is a Rust-based CLI tool that hides encrypted messages inside images using LSB (Least Significant Bit) steganography. It supports optional encryption algorithms (like XOR), and allows deterministic or randomized bit placement using a PRNG seed.

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🚀 Features

• 🧊 Embed and extract messages in .jpg, .jpeg, and .png images
• 🔐 Optional message encryption (XOR, AES, Caesar, Rot13, None)
• 🎲 Deterministic pseudo-random embedding with seed support
• 🧪 Built-in test suite for validation

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⚙️ Build & Run

1. 📥 Build the project

cargo build --release

2. Get help

cargo run -- -h

3. 🖊️ Embed a message

cargo run -- --img <image-path> --msg <"your msg here"> --out <output-path.png> \
--encrypt <encryption-algo> --key <your-key> --prng --seed <your-seed-for-prng>

or

./target/release/cimg  --img <image-path> --msg <"your msg here"> --out <output-path.png> \
--encrypt <encryption-algo> --key <your-key> --prng --seed <your-seed-for-prng>

• note: use -h for more help

3. 🔍 Decrypt the message

cargo run -- -i <encrypted-image-path> --decrypt <decryption-algo> --key <your-key> --prng --seed <your-seed-for-prng>

or

./target/release/cimg -i <encrypted-image-path> --decrypt <decryption-algo> --key <your-key> --prng --seed <your-seed-for-prng>

🧪 Run Built-in Tests

cargo test

Add cimg to your bin

make

• This will add cimg to your PATH. Now you can run cimg from anywhere.

Try to decrypt my maessage

• hint: no... hint for you (iykyk).