Size efficient preprocessed symmetric rsa for wireless body area network

Abstract

Wireless Body Area Networks (WBAN) is becoming highly distinctive within health application. Security is important for individual nodes because such applications deal with sensitive data. Within WBAN, approaches with higher security with less computation are preferred along with smaller key size because of limitations of WBAN. However reducing key size can result in reduction in security level. In this paper we propose the use of message authentication for WBAN with pre-processed symmetric RSA (PSRSA). PSRSA is based on RSA with smaller key with multiple layers of pre-processing to increase the total combinations. Based on our analysis, PSRSA provides high security level with smaller key size compare to RSA. We implemented PSRSA to check feasibility and tested couple of scenarios.