E2VoIP2 energy efficient voice over IP privacy

Abstract

Due to the convergence of telecommunication technologies and pervasive computing , voice is increasingly being transmitted on IP networks, which is commonly know n as Voice over IP. Despite many advantages offered by this technology, VoIP applications inherit many challenging characteristics from the underlying IP network, such as QoS and security concerns. Traditional ways to secure data over IP networks have negative effects on real-time applications and on power consumption, which is significant in power constrained handheld devices. In this work, a ne codec-independent Energy Efficient Voice over IP Privacy (E2VoIP2) algorithm i s devised to limit the overhead of the encryption process, without compromising the end-to-end confidentiality of the conversation. This design takes advantage of VoIP stream characteristics to encrypt selected packets using a secure algorithm, while relaxing the encryption procedure in-between these packets. Experimental results show a substantial improvement in terms of the number of CPU cycles which results in reducing processing time and consumed power. In addition, the proposed method is flexible in terms of the balance between security and power consumption.