Görüntü steganografisi

Steganography is very important technique for information security as it provides a solution of hiding information. Compared to encryption it has the advantage of considering the cover data as the information data itself while actually the secret information is hidden inside it. Such a method has several applications like watermarking and fingerprinting where steganography methods are used but the objective of those applications are different. The application that we are concerned in for this project is the covert communication systems. There are different types of cover mediums that can be used in steganography, such as text, image, or audio steganography. We chose image steganography where the images are used as cover object to be our base of experiments for the proposed LSBG method. One of main steganography methods is least significant bit (LSB) but it has some limitations therefore many approaches have been proposed to improve it. Some improvement methods have been applied to LSB such as LSBM and LSBMR [7]. The new proposed improvement method is least significant bit gaped (LSBG) where the aim is to improve its imperceptibility compared to LSB and to improve a new key structure that will increase the level of securing the information.