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Remote user authentications are an essential tool for e-commerce in Internet environment. In these systems, identity privacy is provided by concealing user's identity. In this article, we introduce the identity privacy study of this setting, and explore a secure and efficient dynamic ID-based remote user authentication protocol with untraceability. We adapt a pair of dynamic IDs to realize the user's...
Link quality for WSN is easy to be disturbed by the environment. Link quality not only affects the reliability of data transmission in the network, but also determines the performance of related Upper-layer network protocol. Therefore, link quality evaluation becomes a considering question. The link quality evaluation methods include data package delivery rate and LQI(Link Quality Index). Practical...
Tang and Wu proposed an efficient mobile authentication scheme for wireless networks, and claimed the scheme can effectively defend all known attacks to mobile networks including the denial-of-service attack. This article shows an existential replication attack on the scheme and, as a result, an attacker can obtain the communication key between a mobile user and the accessed VLR. Fortunately, we improve...
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