Minimizing energy consumption of secure wireless session with QoS constraints

In this paper we will investigate techniques to minimize the energy consumed by a secure wireless session without compromising the security of the session. While it has been shown in [8] that compressing the session negotiation messages, the protocol header, and the data reduces the energy consumed by a secure session [8], in this paper we show that matching the block size of compression to the data cache size of the device is important. We also investigate the choice of a bulk encryption algorithm (3DES vs. AES) and a key exchange protocol (Diffie-Hellman vs. RSA) based on the energy consumed by a secure session. These techniques yield energy savings of 1.3x during data transmission and 1.2x during data reception beyond that obtained by techniques in [8]. These techniques complement and supplement those proposed in [8] and when combined yield an overall energy savings of 2.1× during data transmission and 4.35× during data reception.