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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]

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]

Wireless networks have been rapidly integrated with the wired Internet and have been widely deployed. In particular, IEEE 802.11b WLAN is the most widespread wireless network today. The IEEE 802.11b WLAN supports multiple transmission rates and the rate is chosen in an adaptive manner by an auto rate control algorithm. This auto rate control algorithm deeply affects the total system performance of the IEEE 802.11b WLAN. In this paper, we examine the WLAN performance with regard to the auto rate control algorithm, especially the ARF scheme, which is the most popular auto rate control algorithm in 802.11b based WLAN products. The experimental results indicate that the ARF scheme works well in the face of signal noise due to node location. However, the ARF scheme severely degrades system performance when multiple nodes contend to obtain the wireless channel and the packet is lost due to signal collision. [ABSTRACT FROM AUTHOR]