How to use

1. Choose a master password, say "password"

2. Get sha256 chksum.

echo password | sha256sum

3. Set the variable MASTER as the output of the previous command.

4. To hide data run

cargo r -- enc "png_name" "secret to hide"

This will produce a png_name-output.png

5. To get back data run

cargo r -- dec "png_name-output.png"

You'll be prompted for the original master password

Is the data completely hidden?

No. Anyone with sufficient programming knowledge can easily reverse engineer the encoding algo. Do not use this to store nuclear launch codes