A Steganography Implementation based on LSB and DCT

Sujit Patil, Shrikant Joshi

Abstract: In recent years, Steganography and Steganalysis are two important areas of research that involve a number of applications. These two areas of research are important especially when reliable and secure information exchange is required. Steganography is an art of embedding information in a cover image without causing statistically significant variations to the cover image. Steganalysis is the technology that attempts to defeat Steganography by detecting the hidden information and extracting. In this paper a comparative analysis is made to demonstrate the effectiveness of the proposed methods. The effectiveness of the proposed methods has been estimated by computing Mean square error (MSE) and Peak Signal to Noise Ratio (PSNR), Processing time, security. The analysis shows that the BER and PSNR is improved in the LSB Method but security sake DCT is the best method.

Keywords: Steganography, Discrete Cosine Transform DCT, LSB Least Significant bit