Jae-Pil Lee

The Analysis and Countermeasures on Security Breach of Bitcoin

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.

Design and Implementation of Disaster Information Alert System Using Python in Ubiquitous Environment

With the rising occurrence of disasters at home and abroad, the disasters threatening the public’s life and health, such as natural disasters, have become larger and more complicated. It is very essential to establish the disaster management cooperation system joined by citizens and civic groups. In conventional disaster management system, Disaster Information (DI) is provided by 3G mobile and DMB service. However, it is urgent to build a disaster management system which can respond to disasters effectively depending on their patterns. This study proposed a DI alert system in ubiquitous environments, which provides DI in ubiquitous technology and the network technology supporting Beacon and smart mobile. To do that, this study used the Python-based to design DI web service and implemented the system that collects DI generated in disaster area and Beacon information around the area and provides a DI alert to the smart mobile devices of DI service users.

Study on Medical Emergency Alert Algorithm Based on Acceleration Algorithm

The system aimed at in this study is for high risk group of patients who require continuous medical checkups. For swift alert and informing to medical staff when a patient incurs abnormal medical condition, the system proposed in this study uses acceleration (tangent) algorithm the check any change in patient conditions. The researchers worked to identify any abrupt change by employing a computing formula based on body temperature/pulse/heartbeat/blood pressure measured by PHD, a biometrics measuring device attached to a patients body.

Development of mobile hybrid medintegraweb app for interoperation between u-RPMS and HIS

This study was intended to extend the existing research on u-RPMS(USN Remote Patient Monitoring System), which is used to send patients‘ biometric information to HIS (Hospital Information System) through smartphones, and thereby make u-RPMS interoperate with HIS, and develop hybrid web/app in order to use integrated medical service and patient monitoring service on the mobile environment. In the case of u-RPMS, the existing study results were used. And, hybrid web/app named MedIntegra Web(Medical Integra Web) project was implemented with the use of Sencha Touch framework and HTML5/CSS3. The finally implemented MedIntegra Web was able to provide remote patients‘ information and status on the mobile environment, and, especially, to help the location of an emergent patient.

Designing Medical Integra Interface with u-RPMS and HIS

We intend to design the interface for compatibility with HIS (Hospital Information System) by applying HL7 (Health Level 7) to u-RPMS (USN Remote Patient Monitoring System) system that collects the patients’ biometrics remotely and transmits them to smartphone finally. This means that the collected information of patients do not simply transmit to the remote site, but can be applied by the standardized system even when the patients visit the hospital. As the patients’ biometrics is also collected/processed though smartphone, we have designed them so that the efficiency of the medical institutions increases by the accurate and prompt provision of receipt and treatment.

SSL Application for Managed Security between the Mobile and HIS Biometric Information Collection Client

Medical institutions collect and utilize biometric information of patients, and provide medical service customized for individual patients. There is increasing need of managed security as an alternative to the threat of privacy relating to biometric information leakage. In this study, SSL/TLS(Secure Sockets Layer/Transport Layer Security) is applied in order to protect biometric information when sending biometric information that is generated real time in medical managed security and collected in a mobile device and SSL to HIS (hospital information system). An SSL security model between mobile device and HIS has been designed and applied to send biometric information safely and wire shark was used to verify packet transmission between mobile and HIS.

Assessment of Compatibility between Standard Medical Systems of u-RPMS and HL7

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 traffic performance evaluation between remote server and mobile for applying to encryption protocol in the Wellness environment

Abstract 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. Key Words :

Study on Low-Power Transmission Protocols for ZigBee Wireless Network-Based Remote Biosignal Monitoring Systems

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.

Design and Evaluation of Safe Seamless Service Model between Multiple Wireless Network Sections of u-Wellness Environment

The u-Wellness service is the field that falls under the health management aspect not containing treatment / decision-making of patients among u-Health fields. This thesis designed and evaluated the model of MBB(Make Before Break) way for seamless safe connection in a section where a user moves freely in remotely transmitting blood pressure / pulse / momentum information of a user holding a smart mobile device to a medical institution and health care institution. There are no services associated with the lives of patients but SSL application was a prerequisite in accordance with the obligation to provide and connect safe services pursuant to Personal Information Protection Law.