Design and Implementation of Secure Public Key Steganography

Abstract

Several approaches and techniques have been proposed to makecommunication via the internet secure; one of these approaches is steganography.Steganography is the art and science of hiding communication, a steganographicsystem thus embeds hidden content in unremarkable cover media so as not toarouse an eavesdropper’s suspicion. In this research the proposed method is apublic key steganography technique and it embeds a secret message in digitalimage with multi level of security. The proposed method uses Discrete CosineTransform (DCT) to embed a secret message in Bit Mapped Image Format forMicrosoft Windows (BMP) image with high invisibility and high correlationbetween cover-image and stego-image acceptable hiding data rate.