3-Level security based spread spectrum image steganography with enhanced peak signal to noise ratio
Poonam Yadav, Maitreyee Dutta · 2017
This research elucidate a method of enhancing peak signal to noise ratio and minimizing mean square error through spread spectrum image steganography. The center of focus is more onto security, for that three levels of security have been designed which are as follows: First level indicates security of hidden text inside cover media by RSA Encryption with Diffie-Hellman Key exchange algorithm, Second level of security is maintained by compressing the data to be hidden using Run-length Encoding (a lossless compression). Further the communication is kept more secured by spreading the message all over the pixels of cover media using pseudo random generator that generates random locations of pixels in an image and embedding message with Least Significant Bit algorithm to make it highly indiscernible. With this technique PSNR of 71.347 dB and MSE of 0.0048 achieved with compression ratio 0.5 and BER of 0.0171.