Comparison of Steganography at One LSB and Two LSB Positions
R. S. Gutte, Y.D. Chincholkar · International Journal of Computer Applications · 2012
The use of Internet has been extensively increased.Sometimes, it is needed to keep the information secret and secure without attracting the attention of unauthorized person.Here, we proposed Text Steganography method along with cryptography for secret communication.It uses a simple method of steganography which is the data hiding at LSB positions.We compared the data hiding at one LSB and two LSB positions and evaluated the performance parameters like Standard Deviation, MSE and Entropy etc.The hiding of data at LSB positions is not fixed therefore it is a stronger approach.The data is encrypted using Extended Square Substitution Algorithm.It covers all the alphabets, special characters and mathematical symbols like µ, ß, þ, Ø.Each pixel of the image is considered as a byte.The encrypted text is then embedded at LSB positions of each pixel and the carrier image after embedding the data is called Stego image.The stego image is then transmitted and the secret data is then successfully extracted at the receiver.The MATLAB has been used for implementation.