A Progressive Chaotic MPEG-4 Video Encryption Scheme for Wireless Networks

The intrinsic vulnerabilities of wireless networks place a great demand on efficient encryption techniques.With the proliferation of video streaming applications, the need for multimedia encryption techniques is becoming of utmost importance. This paper presents a scalable coding scheme for multimedia transmission over wireless networks. The proposed approach unifies the compression and encryption functionalities using the wavelet transform and chaotic functions to build up random permutations. The major advantage of our chaotic multimedia encryption process is that a client can access to multiple resolutions of the streamed video. These resolutions vary according to the security level of the client as well as the networking and processing capabilities. A set of simulations have also been carried out to assess the performance of the proposed coding scheme in terms of security, compression ratio, and error resilience.