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This paper presents a robust and secure hybrid connectivity framework for ubiquitous convergence in a home environment. The proposed hybrid connectivity framework is based on various consumer electronics and mobile devices with wireless interfaces such as IEEE 802.15.4 (e.g., radio frequency for consumer electronics (RF4CE) or ZigBee) and IEEE 802.11. In particular, this framework involves an RF4CE-based WiFi zero-configuration scheme. It simplifies connectivity by means of secure key distribution and a simple WiFi configuration involving WiFi-capable devices. To validate our framework, we analyzed the system and security performance using real hardware prototypes. Copyright © 2011 John Wiley & Sons, Ltd.

Employing public key-based security architecture is inevitable for the advanced security applications in the mobile networks. However, key storage management problems have arisen, because the public key computation is still the large overhead to USIM, and the mobile equipment has potential threats of the key leakage or loss. In order to solve such shortcomings, we improve the key-insulated models and propose "Trust Delegation" model that the overall security computations are operated in ME, while the initial private key still remains in the secure storage in USIM. Our model is resilient against not only key exposure but also key loss. Finally, we show that the overall transactions can be reduced to one-third than current 3GPP Generic Authentication Architecture.

Currently, it is rapidly increasing convergence services based on various mobile devices with sensors like Smart Home. Specifically the mobility of the sensors in Smart Home merged with wireless sensor networks (WSN) brings security issues such as re-authentication and tracing the node movement. We extend our novel and efficient node authentication and key exchange protocol that support Irregular distribution. Compared with previous protocols, our protocol has only a third of communication and computational overhead. We expect our protocol to be the efficient solution that increases the lifetime of sensor network.

Mobility of sensor node in Wireless Sensor Networks (WSN) brings security issues such as re-authentication and tracing the node movement. However, current security researches on WSN are insufficient to support such environments since their designs only considered the static environments. In this paper, we propose the efficient node authentication and key exchange protocol that reduces the overhead in node re-authentication and also provides untraceability of mobile nodes. Compared with previous protocols, our protocol has only a third of communication and computational overhead. We expect our protocol to be the efficient solution that increases the lifetime of sensor network.

With the increasing use of satellite communications, there is growing concern, regarding security problems. These problems are caused by characteristics such as providing world wide coverage with distance-insensitive cost, large transmission bandwidth, and so on. In this paper we propose four kinds of key distribution models to achieve information security between satellite terminals. Also, through performance analysis of proposed models, we verify their suitability to satellite environments.

With the increasing use of Grid computing, it is growing to concern a computing power and infrastructure problems of Grid environments. But, it is also important to consider its security problems because of joining many different users. In this paper we first consider satellite environments having a variety of users like Grid environments. We proposed two kinds of key distribution models to achieve a security between satellite terminals. At last, through performance analysis of proposed models, we considered their suitability to satellite environments and Grid computing.