Image Encryption using Blowfish Algorithm

In recent years, with the wide development in communications networks and applied the e-government in most field depending on the internet and its technologies, with the development in the hackers ability to intruder the communication channels. Security is a major concern while sending and receiving sensitive data over web. Cryptography aims to protect the content of digital image during transmission and to be able to recover its content in receiver’s side with sufficient level of accuracy. In the area of multimedia, an image has become important medium of communication, they are used in many fields such as medical science, military; they are stored or transfer through network, security of such image data is important. This paper is aimed to design and develop a method to address this problem. The proposed method is based on Blowfish algorithm with enhanced features. It has been enhanced with confusion and diffusion method to strengthen the security of image. Our proposed model gives two layers of security for secret data, which fully satisfy the basic key factors of information security system that includes: Confidentiality, Authenticity, Integrity and Non – Repudiation. The proposed encryption Algorithm in this study has been tested on some images and showed good results.