In the second part of his exploration into steganography, the practice of hiding information in images, Pampuna recalls a course in digital forensics that sparked his interest in leaving and finding traces of data.
He describes the Least Significant Bit (LSB) technique which involves modifying the least significant bit of an RGB value in a pixel to hide information in an image, such as a company logo.
It is impossible to detect any change in the logo, but the method allows him to embed hidden information that can only be retrieved by knowing the key.
However, the process of uploading images to Medium destroys the data embedded in the LSB, making it permanently inaccessible.
So, Pumuna concludes that while it is fun to explore the methods of hiding information in plain sight, it is more important to focus on securing the channels used to transfer data.