Enhancing Security with the Combination of DCT & 3DES

Abstract

Information security is becoming more important in data storage and transmission. Because of widely used images in security process, it is the important confidential image data from unauthorized access. The original image was converted by using two dimensional transform and encryption 3DES with two keys. This system presented a transformation algorithm based on the image cosine transformation and a well known encryption and decryption algorithm called 3DES. This paper also analyzed the image encryption algorithms DCT and 3DES. The original image is encrypted after the transformation process. In this approach to reduce the computational requirements for huge volume of images and resulting high speed transformation and encryption system.