Wireless body area networks (WBANs) are receiving a significant interest as an emerging technology in next generation wireless networks. Security challenges as well as this interest are also beginning to rise to the surface. We derived specific security requirements from WBANs, and proposed a new hybrid security protocol for WBANs which satisfies these requirements. This proposed protocol dealt with the overall security including up to the in-, on-, and out-body, and utilized two heterogeneous cryptosystems (the symmetric and asymmetric) for diverse environments of WBANs. Our protocol shows that it satisfies more security requirements than existing security protocols including the overall coverage of WBANs.

As home network is expanding into ubiquitous computing environment and lots of private information is accessible, it is required to protect home network system from illegal accesses and security threats in open network. In general deployment of home network, a secure home gateway is located at the boarder of each home and regarded to be a core entity providing services and controlling traffic. So in this paper, we propose a security system guaranteeing security, availability, and reliability based on the secure home gateway and describe our implementation on home network including authentication, authorization, and security policy.

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Abstract. As home network service is popularized, the interest in home network security is going up. Many people interested in home network security usually consider user authentication and authorization. But the consideration about home device authentication almost doesn't exist. In this paper, we describes home device authentication which is the basic and essential element in the home network security. We propose home device authentication framework, home device registration and certificate issuing method, and home device certificate profile. Our home device certificate profile is based on the internet X.509 certificate. And our device authentication concept can offer home network service users convenience and security.