Young-Hyuk Kim’s research while affiliated with Hannam University and other places

Currently, disaster data is collected by using site-based, limited regional collection. In this study, a system that collects location information of users that have a mobile device is proposed. The proposed system collects real-time disaster data by using crowd sensing, a user-involved sensing technology. In order to quickly and accurately determine a large amount of unstructured data, among big data frameworks, the Hadoop framework is applied as it efficiently sorts a large amount of data. Also, to enable fast local evacuation alert for users, a beacon-based ad-hoc routing interface was designed As an integrated interface of the proposed systems, a hybrid app based on HTML5, which uses JSON syntax.

In this paper, security vulnerabilities that can be found in hybrid apps, by which important data are downloaded from a web server, were analyzed and HIGHT algorithm based on OTP delimiter modification and bit slicing was proposed to enhance security of hybrid apps. The hybrid app, to which the proposed method was applied before analysis, is a medical app for research and monitors biometric data of patients in the healthcare field. This app is monitoring patient’s biometric data continuously. Thus, this app generates considerable mobile traffic and transmission delay. After installing the app in a mobile device, reverse engineering was used to check the address from which the app requests important data, and a web server analysis tool was used to obtain important data that enables security attacks including the sitemap, type and version of application, and open source. To solve these problems, the security protocol proposed in this paper was applied, as a result important data were protected without transmission delay and it shows that proposed protocol can adopt high speed mobile communications.

Due to the strength of bitcoin including the convenient payment and transfer, exchange into legal tender, low transfer fee, and others, its usage is increasing dramatically. Bitcoin is an e-money and virtual currency currently used as a means of payment in about 20,000 online companies and 1,000 offline stores as of Feb. 2014. Different from previous e-money, there is no issuing institution and it has trait of no regulation by countries or companies. However, as there is an increase in value of bitcoin followed by Cyprus financial crisis in past March, issues regarding the security breach on the rise. Since the exchange between legal tender and virtual currency is free in case of bitcoin, direct damage caused by security breach is very large. Also, as there is no governing institution, the user is responsible for all loss in case of damage occurrence. Therefore, the purpose of this study is to look into transaction method and security breach trend of bitcoin and its countermeasures.

This paper is to represent web-accessible and network-compatible Mobile ITS Video Control System for Smart APT Traffic Control for where Wi-Fi is avaliable. WLAN for IEEE 802.11a has adopted 5GHz frequency in light of the fact that consumer mobile devices work on 2GHz. For test purpose IEEE 802.11p, being a PHY/MAC standard for WAVE, a V2V/V21 Next-gen Network, replaced IEEE 802.11a. Plus, the test practically established WDS in an apartment complex in Daejeon City in confirmation of compatibility of Mobile ITS Video Control System while handling Wi-Fi handover issues.

To provide improved environment for medical information service, mobile devices can be used for delivering personal information to HIS (Hospital Information System). MII (Medical Integration Interface) of u-RPMS (ubiquitous Sensor Network Remote Patient Monitoring System) in the previous study plays such role as an interface. However, information may not be delivered due to difference in version of the medical data processing standard HL7(Health Level 7). In this paper, the compatibility according to the HL7 version of HIS was assessed when sending personal information via u-RPMS to HIS. As a result, it was found that it is compatible when the syntax of v2.x is sent to v3.0 by using XML(Extensible Markup Language)Parsing.

The objective of this study is to propose the encrypted mobility Energy-Enterprise Security Management (E-EMS) for a green race environment currently widely adopted througout the global. E-EMS is a system which can actively monitor and control energy consumption. Unlike wired network, there are certain weakness in terms of surveillance and security for wireless network so it is critical to have information exchange between modules, and administrators for the management of each security module. To overcome the aforementioned limitation of wireless network, this study proposes an integrated security control system equipped with Smart Rack and AES, SEED encryption protocol.

U-WHS refers to a means of remote health monitoring service to combine fitness with wellbing. U-WHS is a system which can measure and manage biometric information of patients without any limitation on time and space. In this paper, we performed in order to look into the influence that the encryption module influences on the communication evaluation in the biometric information transmission gone to the smart mobile device and Hospital Information System.In the case of the U-WHS model, the client used the Objective-c programming language for software development of iOS Xcode environment and SEED and HIGHT encryption module was applied. In the case of HIS, the MySQL which is the Websocket API of the HTML5 and relational database management system for the client and inter-server communication was applied. Therefore, in WIFI communication environment, by using wireshark, data transfer rate of the biometric information, delay and loss rate was checked for the evaluation.

This study uses low-power, low-speed ZigBee sensors with defined network and application layers based on the media access and physical layers of Wireless Personal Area Networks (WPAN). ZigBee sensor nodes were connected to Personal Health Devices (PHD), which measure the biosignals of patients, to form a wireless network. We do not apply generalized ad-hoc routing protocols or tree structures but instead are proposing modified hop-count routing protocols using the WBSS characteristic of IEEE 802.11p. This is because sensor nodes operate from fixed positions and smartphones, which play the gateway role, has the characteristic of constantly shifting location, from the patient’s hand and ears to neraby desks. We used 3 PHDs (ECG, pulse and blood pressure) and connected ZigBee modules using external batteries to confirm whether normal service was being performed.

Scientific and technological research data is increasing exponentially and, Kisti(Korea Institute of Science and Technology Information) built and supported GSDC(Global Science experimental Data hub Center) depending on the needs processing large data computing and storage devices. Mobile web standards-based the MUPS was built for global community and services of gsdc to spreading mobile devices rapidly. And for analyze Operational status and system resources of GSDC at n this paper researched and implemented system resource monitor method of gsdc to mobile web environment, in this paper researched and implemented system resource monitor method of gsdc to mobile web environment. Research support system of GSDC operated by scientific linux. Sysstat resource monitoring tools create a daily report through sar(system analysis report), after sadc(system activity data collector) collected system resource utilization information. In this paper, sar reports designed and implemented in mobile web to can visualize in a mobile environment. We do not depend specific OS by implementation of the mobile web. So we are available in variety mobile OS. And through provided visual graph, this system can monitor easily and more conveniently then the existing system.

This paper is for patients with chronic conditions who use a patient monitoring service with a smart mobile at the U-WHS(Ubiquitous-Wellness Healthcare System). This system is for collecting and transmitting of biometric information in a wireless environment. Also, in order to protect biometric information at the U-WHS in a safe manner, a model applied with SEED algorithm including HIGHT, which has been designed based on previous studies [3] applying of the existing HIGHT algorithm, has been compared and analyzed.