Analysis of Steganography with Various Bits of LSB for Color Images

The technique for hiding any information in other information is known as Steganography. According to the technique of Least Significant Bit encryption, secret message is embedded in the least significant bits of the cover image and identification of secret message in the cover image becomes very difficult. This method can be applied for embedding secret messages in many formats like 8-bit, 24-bit or gray scale. This paper compares the methods of LSB encryption for different bits and analyse the value of RMSE and PSNR for each type of embedding. This paper compares the results of 2, 3, 4, 5 and 6 bit encryption and proposes the best encryption both in the sense of quality of stego and retrieved secret image. Here 0-bit, 1-bit, 7-bit and 8-bit embedding techniques are not considered. The 0-bit will not embed any secret image. The 8-bit will not have even single bits for storing cover image. The 1 bit and 7 bit is inadequate for embedding and storing the cover image. The 1-bit and 7-bit will result extreme bad quality of retrieved secret image and stego respectively. The 1-bit and 7-bit will result extreme bad quality of retrieved secret image and stego respectively.