A Better RGB Channel Based Image Steganography Technique

In this paper a new RGB channel based steganographic technique is proposed. The RSA algorithm is used for encryption and decryption. In a RGB image each pixel (24 bits) is having R-channel 8 bits, G-channel 8 bits and B-channel 8 bits. R, G and B stands for red, green and blue respectively. Out of these three channels, the one which is having the maximum value summed over for all the pixels will be decided as the indicator channel. Out of the remaining two channels (say channel1 and channel2) in each pixel, one channel is used for embedding four bits of the cipher text, depending on its value satisfying one of the four defined conditions. At the receiver side the reverse operation will be performed to retrieve the message. The experimental results show that the performance of this technique is satisfactory.