From the course: Cybersecurity Foundations: Computer Forensics

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Case Study: Steganography

Case Study: Steganography

From the course: Cybersecurity Foundations: Computer Forensics

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Case Study: Steganography

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- [Presenter] Steganography is a way to hide information inside the picture file. Just like any other files, we store pictures in zeros and ones on our computer. The smallest unit of an image file is a pixel, and a picture file stores its pixel information and binary numbers in a REST or file format. Assume that we use 24 bits to store a pixel. If it changed the last bit of each pixel data, it won't change the pixel too much in terms of its color. This is why we can change a picture by embedding our own information into the pixel data and still make it look indistinguishable from its original version. If we have 10,000 pixels in a picture, we have 10,000 opportunities to change their binary representations slightly. OpenStego is a free steganography tool. You can download it from this website. Let's give it a try. The user interface is relatively simple. The first field asks for a message to hide. I already created the…

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