Li-Chiun Lin

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 Abstract—A division-summation (D-Σ) digital control for three-phase inverters to achieve active and reactive power injection has been presented. It can overcome the limitation of abc to dq frame transformation. However, the D-Σ control requires four sets of control laws to cover four quadrant operations: grid connection (PF 1 ~ ±0.866), rectification with(More)
User authentication over the Internet has long been an issue for Internet service providers and users. A good authentication protocol must provide high security and mutual authentication on both sides. In addition, it must balance security and usability, which has been shown in the literature to be a difficult problem. To solve this problem, we propose a(More)
Internet of things (IoT) realizes the concept of bringing things connected together. Data are exchanged and controlled within one or more IoT networks. Sensitive data transferred between different IoT networks may also lead to data leakage. One way to reduce the risk of these problems is to employ steganography while delivering secret information over the(More)
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