Message Transfer Using Steganography
Prof., Mr., Ms., Mr., Ms. · Zenodo (CERN European Organization for Nuclear Research) · 2022
-Steganography is used to hide information like text, images, videos in other media files like images, videos, music. We can use steganography to transfer messages from one host to another securely. Nowadays we cannot trust the server side to encrypt our messages end to end as the server side knows the keys of both the sender and receiver. Using steganography, we can make sure that the server does not decrypt and store our messages in plain text. We can secure our messages from server side and intruders also. In steganography we store our secret data into the least significant bits of the pixels. Storing data into the least significant bits does not affect the image that much as the values of the pixels change slightly. We can use different techniques to cipher data into images like sequential, prime and equations ciphering. To decipher such an image the intruder has to check for all the combinations of pixels which increases the time complexity of this task to exponential. Using this technique we can protect our messages not just from intruders but also server side proxy attacks. In this method the sender and receiver mutually decide some keys which will be used to cipher and decipher data from images. The user only needs to remember two keys, the starting point and the method used to cipher data into the image.