An improved method for LSB based color image steganography combined with cryptography

In this paper, an improved LSB information hiding algorithm of color image using secret key is be proposed, combining information hiding and cryptography, increasing the human eye visual features, and the identity authentication based on digital signature and encryption technology to improve the security of information hiding. Finally through the experiment and the comparison of the peak signal-to-noise ratio (PSNR) and safety, the improved LSB image steganography algorithm using the encryption technology is better than general LSB image steganographic method with better security and higher PSNR.