Due to numerous modern scientific developments and new perceptions, the research on wireless body area networks (WBANs) and low power wireless communications, pervasive health monitoring and management services are increasingly popular. A major challenge for healthcare is how to provide enhanced services to a growing number of people using limited financial and human resources. Pervasive healthcare is reflected a solution to many existing problems and a possible future of the current healthcare services. In simple terms, pervasive healthcare can be defined as healthcare to anyone, anytime, and anywhere by removing locational, time and other restraints while increasing both its coverage and quality. These requirements could be effectively supported by universal, efficient and reliable access to healthcare services, providers, and biomedical information that is available at any time. Cloud based wireless body area networks (WBANs) considerably assist resourceful patient treatment of high quality, inappropriately it's a great challenge about the patient's information secrecy and privacy. The traditional scenario focuses on where patients securely stay indoors. This research focuses on providing solution to more practical situation of cloud based WBANs in m-healthcare social networks where patients traverse among blocks outdoors and WBANs are more vulnerable to sophisticated including even node compromise attack. This work delivers some security measures for addressing these vulnerabilities.