A Solution to Text Hiding in Media with Hybrid Gravity Search Algorithm and Transposition Scheme

Abstract

This paper suggests a new solution to conceal text messages in media by hybridizing a meta-heuristic algorithm of the Gravity search algorithm (GSA) and transposition method. Several stages are implemented, namely the concealment stage, extract stage, and evaluation metrics, whereas cover text and message text are split into blocks, and each block contains one letter, relying on the fitness value of related notes both of secret information and cover message. The best positions of the letters are taken optimization by the adjusting GSA that is used to hide the confidential message. The steganography process is then carried out through the transposition process between the secret and cover message. While in the extraction stage, the fitness value of steganography message letters is found by using GSA to determine the positions that represent the secret letters. Experimental results of the proposed scheme are compared with the other in the literature which shows that the proposed approach presents robust security, provides high capacity and resistance against several steganalysis attacks.