Szu-Chuang Li

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Differential privacy (DP) is a popular technique for protecting individual privacy and at the same for releasing data for public use. However, very few research efforts are devoted to the balance between the corresponding risk of data disclosure (RoD) and data utility. In this paper, we propose data-driven approaches for differentially private data release(More)
The Taiwan Information Security Center (TWISC) was initiated as a research program in April 2005 and funded by the Ministry of Science and Technology for the past few years. TWISC pulls together experts in information security from various universities and research institutes in Taiwan with an aim to boost research and development activities in information(More)
There have been plenty of R&D efforts to achieve precise indoor positioning of users. With weak or no GPS signals, Wifi / Bluetooth and other approaches such as ultrasonic and accelerometers has been used for indoor positioning. In this demo we focus on reconstructing visitors route using the combination of Bluetooth proximity tags and custom made(More)
Differential privacy is a recent notion of data privacy protection, which does not matter even when an attacker has arbitrary background knowledge in advance. Consequently, it is viewed as a reliable protection mechanism for sensitive information. Differential privacy introduces Laplace noise to hide the true value in a dataset while preserving statistic(More)
Bluetooth beacons are usually configured to send out simple ID information. For the user to send own locational information to a remote server he/she must have a mobile phone with dedicated APP installed, as well as a working Inernet connection. In this study we build a network using Bluetooth beacons, which enables collection of locational information(More)
Bluetooth beacons have been used to identify people's location. But due to its limited capability, mobile APPs and Internet connection are often needed to relay the ID information broadcasted by Bluetooth beacons. In this study we built a complete solution based on customized Bluetooth beacons and Bluetooth bracelets. The process is "inverted" as Bluetooth(More)
Founded in February 2007, the aim of the Research Center for Information Technology Innovation (CITI) at Academia Sinica is to integrate research and development efforts in information technologies by various organizations in Academia Sinica, and also to facilitate and leverage IT-related multidisciplinary research. As a integral part of CITI, Taiwan(More)
Enterprises and governments around the world have been attempting to leverage intelligence from the community by making formally in-house database available to the public for analyzing. The released data was often "anonymized": sensitive attributes were removed from the dataset for privacy protection. However it is proved that masking(More)
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