As we have discussed in previous chapters, features are one of the most important components—and objectively the most important component—in the model building process. When approaching a new problem, the main question that arises is: how are you going to solve this problem? For example, a common exploit in the cyber-security world is the use of steganography. Steganography, which dates back to 440 BCE is the practice of hiding data within a container. This container has ranged from drawings, crosswords, music, and pictures, to name a few. In the cyber-security world, steganography is used to hide malicious payloads in files that would otherwise be ignored, such as images, and audio and video files.
Take the following image of a basket of food. This image—created using an online steganography tool—has an embedded message in it; have a look at whether you can spot any unusual patterns in the following image:
Most tools today...
