Rajkumar Yadav

A new LSB-S image steganography method blend with Cryptography for secret communication

In this paper, a new method of image steganography in spatial domain on gray images blend with cryptography is present. Steganography and cryptography are used to hide message and its meaning respectively. By this method, the message is first encrypted using Vernam cipher algorithm and then the message (encrypted) is embedded inside an image using the new image steganography method i.e. LSB with Shifting (LSB-S). In LSB-S method we have used four LSB of the pixel and performed circular Left shift operation and XOR operation. The combinations of Cryptography and steganography method enhance the security of embedded data. After implementation the proposed method it is checked on the different parameter such as PSNR and MSE and got good results.

PSNR and MSE based investigation of LSB

This paper provide the detail study of LSB Steganography method and analyzes the PSNR and MSE of LSB data hiding technique on the basis of different message sizes i.e 2KB, 4KB, 8KB in different 256*256 gray scale images in spatial domain. Also a investigation of 128*128 on 1KB and 2KB are given. The proposed LSB scheme takes the first LSB bit of the gray scale image and first message bit from the message matrix and embeds the message into the original image. After insertion of first message bit, pixel location of image and message is incremented by one. This process continuous itself till the message length is not equal to zero. After insertion of 2KB, 4KB and 8KB data in various gray images their PSNR and MSE is obtained and analyzed and it shows that the PSNR is more for the small message and less in case of large message size. The MSE is less for small message size and more in case of large data size. The main purpose of this study is that it will provide a platform for the beginners who want to study in the field of information hiding and image steganography.

New approach toward data hiding using XOR for image steganography

With the growth in internet usage, there is a proportional growth in security and privacy demands. In this paper, a three bit XOR steganography system for concealing messages into gray Images is projected. In this method, last three bits of pixel value offer 100 percentage of message addition. This new technique uses the XOR operation between the message and original image. If the intruder extracts the last three bits, he would not be able to find the meaning of the message as the message is in decoded form. The maximum no of bit which is to be hidden using this method is equal to the R∗C∗3, where R and C is the rows and column of the image. The time complexity is also calculated which is equal to O(1). Later on the method is analysed on the bases of PSNR, MSE, L2RAT and MAXERR. The projected technique is also matched with other similar techniques to show the superiority.

A New Method of Image Steganography Using 7th Bit of a Pixel as Indicator by Introducing the Successive Temporary Pixel in the Gray Scale Image

As the internet has become the medium for transferring the sensitive information, the security of the transferred message has become the utmost priority. Image steganography has emerged out as the eminent tool of information hiding that ensures the security of the transmitted data. Image files provide high capacity, and their frequency of availability over the internet is also high. In this paper, a method of image coding is proposed that hides the information along a selected pixel and on the next value of the selected pixel, that is, pixel + 1. One bit is hidden at the selected pixel, and the second bit is hidden on the pixel +1 value. On the basis of the 7th bit of the pixels of an image, a mathematical function is applied at the 7th bit of the pixels, which generates a temporary variable (pixel + 1). The 7th bit of the selected pixel and 7th bit of pixel + 1 are used for information hiding and extraction. On the basis of a combination of these two values, two bits of the message can be hidden on each pixel. After implementation, the efficiency of the method is checked on the basis of parameters like PSNR and MSE, and then comparison with some already proposed techniques was done. This proposed image steganography showed interesting, promising results when compared with other existing techniques.

A new image steganography method in spatial domain using XOR

Image steganography is a method for secure data transfer over the internet using image. Now-a-days, as internet is growing, information security is a major concern. In this paper, we present a new technique for image steganography in spatial domain. The proposed method extracts two LSBs and two MSBs of the selected pixel value. Then perform the XOR operation on first and last bit and second bit and seventh bit. On the basis of result of these two XOR operations every bit of secret data is embedded one by one on LSB of selected pixel value. The objective of this technique is to maximize the PSNR rate and invisibility of the secret data with minimal modification to the cover image. Experimental results indicate that our method achieves good image quality when compared with existing methods.