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To detect replica nodes in a wireless sensor network, we propose a distributed, deterministic and resilient (DDR) replica detection protocol developed from a witness node based strategy. In DDR, while a location claim message of each node is sent towards the designated verification location in the network, the consistency of the messages is verified at intermediate nodes en route to its final destination. Compared with previous replication attack detection protocols, DDR achieves better computation and communication performance due to the use of symmetric key cryptography only and early replica detection. [ABSTRACT FROM AUTHOR]

Supporting user mobility is one of the most challenging issues in wireless networks. Recently, as the desires for the user mobility and high-quality multimedia services increase, fast handoff among base stations comes to a center of quality of connections. Therefore, minimizing re-authentication latency during handoff is crucial for supporting various promising real-time applications such as Voice over IP (VoIP) on public wireless networks. In this study, we propose an enhanced proactive key distribution scheme for fast and secure handoff based on IEEE 802.11i authentication mechanism. The proposed scheme reduces the handoff delay by reducing 4-way handshake to 2-way handshake between an access point and a mobile station during the re-authentication phase. Furthermore, the proposed scheme gives little burden over the proactive key pre-distribution scheme while satisfying 802.11i security requirements. [ABSTRACT FROM AUTHOR]

Wireless mesh networks can extend the network service region by just adding APs. However wireless mesh networks also have the same security problems as the traditional wireless LAN. Until now, many methods have been proposed to solve the authentication problem, particularly for the fast handoff, in the traditional wireless LAN. However, previous methods are not efficient to the wireless mesh network with mobile APs because they just considered static APs. In this paper, we propose a new pre-authentication method for the wireless mesh network with mobile APs. We adapted the neighbor graph method of previous schemes for the compatibility. However, our method is suitable to the wireless mesh network by applying a Du et al΄s key distribution. Furthermore, we present a formal analysis about our method by using a logic based formal analysis method. [ABSTRACT FROM AUTHOR]

The purpose of digital rights management (DRM) is to protect the copyrights of content providers and to enable only designated user to access digital contents. For a user to share the contents among all his devices in the home network, several domain-based approaches that group multiple devices into a domain have been proposed. In these approaches, however, each device in a domain has equivalent rights on all contents although certain contents require an access control between the devices. In this paper, a new DRM system for home networks is presented. This system enables access control on the contents by a right delegation strategy with proxy certificates. Moreover, it also provides additional functionalities, including restricted sharing and temporal sharing of contents, which are necessary for ordinary scenarios in home networks. [ABSTRACT FROM AUTHOR]

We improve Malkin et al΄s construction (Eurocrypt΄04) of the proxy signature scheme in the random oracle model. Unlike Malkin et al΄s scheme, the proposed scheme does not assume the existence of the trusted secure device, which has a global secret key that all users΄ private keys can be recovered with. This makes the proposed scheme more scalable and efficient because users need not access and cooperate with the secure device to generate their public/private key pairs. We show that the proposed scheme is provably secure based on the modified strong RSA assumption that was made by the Itkis et al (CRYPTO΄01). [ABSTRACT FROM AUTHOR]

In this paper, we present SWATS which supports task-oriented automated teleoperation of Web-based devices. The proposed system employs Semantic Web Services technology and AI planning technique to achieve operational automaticity. [ABSTRACT FROM AUTHOR]