Enhanced Identity Authentication and Context Privacy Preservation in Ubiquitous Healthcare System

Ubiquitous healthcare (uHealthcare) technology is emerging as a solution to increasing chronic disease patients with the advent of aging of society. uHealthcare improves accessibility to medical services but it increases probability of privacy violation of personal medical information. Recently, Huang et al. proposed an identity authentication and context privacy preservation in wireless health monitoring system. However, Lee et al. showed that their scheme has lack of data privacy consideration and not enough security system for physician. Thereby, this paper proposes an enhanced identity authentication and context privacy preservation to solve the problems mentioned in Lee et al. The proposed scheme uses smartcard for the additional authentication and easiness to keep secret values and encryption algorithms for the contextual privacy. Analysis demonstrates the security of the proposed scheme.