Hiding Message in Color Image Using Auto Key Generator

Abstract

This paper suggests a new method for hidden secret message text in a RGB 24-bit color image. The positions of hidden text are selected randomly using auto key generator. The auto key is generated by selected three bytes from image each time, and then deposits these pixels to the main components Red, Green and Blue bytes. The values of least significant bits (LSB) from red color bytes are used to configure a binary number. The binary number determines the hidden position of message text bit in either LSB of green or blue color in the selected bytes, depending on specific criteria. After implementing this method on different images, it was founded easy to implement, high security, and difficulty of detection. The values of some metrics used to measure the efficiency of the proposed method are well. Also, there is no difference between the images before and after the information hiding which detect with human eye perception.