Implementation and analysis of image steganography using Least Significant Bit and Discrete Wavelet Transform techniques

Steganography is classified among the foremost methods employed in data security to conceal and safeguard confidential messages in the data transmitted. Security, especially data security, is an important requisite in today's world hence Steganography has great significance. The paper deals with understanding and implementation of steganography on different images using two different techniques: Least Significant Bit method(secret image is hidden using the bits at least significant level of the cover image) and Discrete Wavelet Transform method(secret image is hidden by modification of the wavelet coefficients of cover image). The image to be transmitted secretly is both encoded and decoded using these methods and a detailed analysis of the resultant images is performed using various image parameters. These experimentally obtained and compared efficiency parameters, thus, demonstrate the efficiency of the methodology proposed in the paper.