Scalable security of streaming multimedia contents

Due to pervasive communication infrastructures a plethora of enabling technologies is being developed over mobile and wired networks. Among these, Voice over IP (VOIP) and video telephony are the most challenging services in terms of quality, real-time requirements, and security. In this paper we investigate data security issues related to streaming of G.729 speech codec bitstreams. We propose a novel scheme that selectively encrypts these contents while providing robust security and guarantee privacy of the contents. The proposed scheme is based on selective encryption and content based shuffling of 60% of each frame contents. The shuffling is achieved using secure hash maps. The proposed scheme is ubiquitous to the end users and can be deployed at any node in the network.