Israt Jahan

A realistic divisible transferable electronic cash for general use

Abstract An elegant and probably new divisible transferable anonymous electronic cash system with observer is proposed in this paper. The proposed divisible e-cash solves most of the crucial problem with existing paper cash and untraceable e-cash proposals. Electronic cash provides unconditional anonymity to the user. Researchers observed, however, that if anonymity in payment systems is unconditional, it might be exploited to facilitate crimes like money laundering. This observation spurred research into the idea of making anonymity in payment systems conditional, and, in particular, revocable by a third party or trustee or observer under bank’s order. An observer is a tamper resistant device that prevents doublespending physically. The user module is called a wallet since, it actually carries money. The idea of having an observer is that it can be incorporated in the wallet in such a way that no user module can do a transaction on its own. For any transaction protocol to be executed by the wallet, it needs help (a secret information) from the observer. The advantage of the proposed electronic cash system is that it is able to construct an observer capable of co-operating with divisible and transferable e-cash. A user who generates a divisible coin can transfer his any divisible amount of e-cash to another user and to a number of users subsequently without losing anonymity and without contacting the bank between the two transactions. Due to the presence of observer, the proposed e-cash has prior resistance of double spending. In each transfer of divisible e-cash, coin authentication and denomination revelation is checked to verify the validity of divisible e-cash. In any stage of coin transfer, the anonymity is guaranteed with protection of double spending.

Secure e-cash model using Java based smartcard

Association of a true observer guaranties electronic cash not to be double-spent by any means. Java card is a smartcard which represents one of the smallest computing platforms. A major challenge influencing the design and implementation of e-cash observer in Java card is the limited availability of computing resources in it. In this paper, we show a new methodology of blending and associating high-level CORBA based bank server, user wallets and resource-constrained Java based observer. We choose a realistic e-cash scheme and show its successful implementation. We also analyze performance of Java card with various lengths of secret keys used for generating electronic coins.

Design and implementation of an advanced telemedicine model for the rural people of Bangladesh

OBJECTIVES Telemedicine based healthcare service faces different difficulties especially in the remote people of Bangladesh. The objective of this study was to implement an advanced telemedicine model in order to provide the healthcare services for the rural people of Bangladesh. METHODS We developed the telemedicine model using an ardunio based low cost portable telemedicine tool kit by interfacing android application. Then we collected ECG, blood pressure, temperature, concentration of glucose in blood, SPO2, body position, airflow, height and weight through our developed model. Moreover, we designed a server for storing the recorded signal from the patients in order to treat them by health care professionals. Finally, this model is successfully tested with the patients of Marie Stopes Bangladesh Hospital Dhaka. RESULTS We have removed noise from the recorded signal successfully through our developed hardware and software based techniques. Real time data were visualized to the expert doctor in order to prescribe them through our model. CONCLUSIONS These results support that rural patient vital information can be collected in an automated way through the advanced model. Both rural and urban doctors can share and exchange patient information more effectively for the treatment of patient. The results of this research indicated that our developed telemedicine system can be used effectively in order to deliver healthcare services for the rural people of Bangladesh.

A survey on the telemedicine in Bangladesh

Bangladesh is a small developing country of South Asia with a huge number of populations. About 75% people live in rural areas where the healthcare facilities are very inadequate in contrast to the urban areas of Bangladesh. The healthcare facilities can effectively be given to this huge number of rural people through Telemedicine. The main aim of this paper is to find out the present states of Telemedicine in Bangladesh and their expectations on Telemedicine. The survey result shows that 94.80% expert doctors, 74% local doctors, 91.42% patients and 80.32% pharmacy owners of Bangladesh want to introduce telemedicine services for the huge number of rural people of our country. This research also proposes the telemedicine operating cost for Bangladesh. The results of this survey can be used to develop a standard open Telemedicine model which will be a feasible health care solution for the people of Bangladesh.

Telemedicine in South Asia for rural people: Current scenario and future recommendations

Telemedicine encompasses methods for electronically transmitting medical information to sustain and/or improve patients health condition by using information and communication technology. Different countries of South Asia have tried to introduce telemedicine services from different perspectives for the rural people where health care facilities are poor through its private and public partnership. This paper examines different telemedicine models of South Asia and finds out the potentials difficulties faced by different models and presents the factors which should be assessed carefully for the successful implementation of telemedicine which will be feasible, easily maintainable, sustainable and cost effective solution for the poor people of rural areas of South Asia regions.

Improving Security of the Telemedicine System for the Rural People of Bangladesh

Telemedicine is a healthcare system where healthcare professionals have the capability to observe, diagnose, evaluate and treat the patient from a remote location and the patient have the ability to easily access the medical expertise quickly and efficiently. Increasing popularity of Telemedicine increase the security intimidations. In this paper, a security framework is implemented for the developed cost-effective Telemedicine system. The proposed security framework secure all the sections of the model following the recommendations of Health Level 7, First Healthcare Interoperability Resources and Health Insurance Portability and Accountability Act. Implementation of this security framework including authenticating the different types of user, secure connection between mobile and sensors through authentication, protect the mobile application from hackers, ensures data security through encryption, as well as secure server, using secured socket layer called SSL. Finally, we can say that the developed Telemedicine model is more secure and it can be implemented in any remote areas of developing countries as like as Bangladesh.

Development of a portable telemedicine tool for remote diagnosis of telemedicine application

At present telemedicine is widely used in developing countries for its variety of health services. In this paper, we have developed a low cost portable telemedicine tool kit for remote diagnosis of patients. Remote patient monitoring is one of the vital component of any telemedicine services. We have successfully able to collect patient data from any remote locations by using our developed tool kit. In this research, we have collected seven vital signs of patients data such as blood pressure, pulse and oxygen in blood, blood glucose level, patient position and falls, body temperature, electrical and muscular functions of the heart through ECG and airflow: breathing through our device in an automated manner. Our developed device is portable and can be used easily with any telemedicine model. In this study, we have developed an android app for collecting the patient data from our device, controlling the device and sending data to the server for telemedicine application. We have made simple user interface of app for better understandability of users. Finally, we can say that our developed portable telemedicine tool kit can be an useful and integrated component of any telemedicine model which will assist the researchers for their applications.