Improved Embedding Based on a Set of Cover Images

摘要

Within this paper, we investigate steganographic techniques based on analyzing a set of realizations of one and the same cover image. Starting point for our investigations is the algorithm ECAP [3] that particularly aims at considering dependencies between pixels while generating the stego image. Within this paper, we point out potential problems of ECAP that may result from irregular differences between the single representations of the cover. Based on these considerations, we discuss possibilities to overcome the mentioned problems and introduce improved embedding techniques. Steganalyt-ical results show the achieved security in comparison to the well known ±1 steganography.