Analysis of Message hiding algorithm in Image Steganography and Designing an Efficient Algorithm

Security, robustness, and capacity are the most important evaluation criteria in steganography. The aim of robustness in image steganography is the stability of embedded message against removal and distortion due to intentional and unintentional attacks such as noise and filtering. Methods of message hiding based on LSB, which are the basis of many steganography algorithms, are vulnerable to such attacks. In this paper, with the two-fold improvement of the well-known hiding algorithm, 𝐹5, the first is to hide two bits of the message in LSB2 of three pixels, the resistor is improved and the latter by hiding the three bits of the message in LSB2 of four pixels, the resistor and the capacity are improved simultaneously.