MULTIMEDIA SECURITY USING CHAOTIC MAP

Abstract

The meaningful exchange of information between two or more entities is known as communication. Multimedia documents such as text, audio, video are the main forms of information in communication, which required transferring information from one place to another. In this era of e-communication, the first concern is about the security of the content which is shared during communication. While the information is on the net, it is impossible to keep track of the path of the information or the copying of information is going through. Security is a continuous process by which data can be secured from several active and passive attacks. There are a number of security techniques by which we can ensure the integrity, confidentiality and authentication of the information. Cryptography is one of the primitive methods to secure information from eavesdroppers, hackers or intruders. The encryption technique protects the confidentiality of a message or information. Since, there are limited encryption algorithms, but vast key space, therefore, the secrecy of encryption depends on the secret key. In this work, a new symmetric image encryption algorithm is proposed based on confusion and chaotic system with byte sequences applied with a novel approach of pixel shuffling of an image which results in an effective and efficient encryption of images. Confusion is created by shuffling the image pixels in a specific order for several iterations. To reduce the volume of multimedia information during transmission Discrete Fourier Transform (DCT) is applied. Statistical analysis, experimental analysis of key sensitivity and measurement of encryption, quantity proved that the proposed image encryption algorithm resulted in a new dimension for secure image transfer in the digital transmission world. The proposed method proved to produce good results for gray as well as color images.