Jsteg is a package for hiding data inside JPEG files with a technique known as steganography. This is accomplished by copying each bit of the data into the least-significant bits (LSB) of the image. The amount of data that can be hidden depends on the file size of the jpeg; it takes about 10-14 bytes of jpeg to store each byte of the hidden data.

Installation

$ sudo wget -O /usr/bin/jsteg https://github.com/lukechampine/jsteg/releases/download/v0.3.0/jsteg-linux-amd64
$ sudo chmod +x /usr/bin/jsteg
$ sudo wget -O /usr/bin/slink https://github.com/lukechampine/jsteg/releases/download/v0.3.0/slink-linux-amd64
$ chmod +x /usr/bin/slink

Usage

 jsteg

Revealing data

jsteg reveal <in.jpg> <output file name>