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In this session, we are going to learn some basic different type s of steganography.
As we have already completed cryptography which is used to turn a readable text to gibberish text that can be hard to translate or convert to the original text. But here steganography uses both encoding and as well as hiding that format in another format.
For eg: Text file inside an image file, text inside an audio file.
Before watching the video, give a try to the lab tasks and try to solve it with your creativity.
The advantage of steganography over cryptography alone is that the intended secret message does not attract attention to itself as an object of scrutiny. Plainly visible encrypted messages, no matter how unbreakable they are, arouse interest and may in themselves be incriminating in countries in which encryption is illegal.
Whereas cryptography is the practice of protecting the contents of a message alone, steganography is concerned both with concealing the fact that a secret message is being sent and its contents.
Steganography includes the concealment of information within computer files. In digital steganography, electronic communications may include steganographic coding inside of a transport layer, such as a document file, image file, program or protocol. Media files are ideal for steganographic transmission because of their large size. For example, a sender might start with an innocuous image file and adjust the color of every hundredth pixel to correspond to a letter in the alphabet. The change is so subtle that someone who is not specifically looking for it is unlikely to notice the change.