High Capacity Image Steganography Based on Curvelet Transform

Steganography is the art and science of concealing information in unremarkable cover media so as not to arouse an eavesdropper's suspicion. It is an application under information security field. Being classified under information security, steganography is characterized by having set of measures that rely on strengths and counter-measures (attacks) that are driven by weaknesses and vulnerabilities. Today, computer and network technologies provide easy-to-use communication channels for steganography. The aim of this paper is to propose a modified high-capacity image steganography technique based on curvelet transform with acceptable levels of imperceptibility and distortion in the cover image and high level of overall security.