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Secure Privacy Preserving MHealthcare Services

Posted on:2016-01-31Degree:DoctorType:Dissertation
Country:ChinaCandidate:Angolo Shem MbanduFull Text:PDF
GTID:1108330473456122Subject:Computer Science and Technology
Abstract/Summary:PDF Full Text Request
The pervasiveness of mobile devices has offered new opportunities for service provision in many ways. One of these areas that has benefited is Mobile Health Care. More and more mobile device-based applications have been proposed to take advantage of this new uptake of technology. This has resulted in increased sources of data, which is a natural consequence of the many devices in use; as most of these mobile devices are connected to the Internet and are constantly exchanging data. Privacy issues are inherent in the course of exchange of information. In this dissertation, a number of solutions are presented that seek to address these challenges as well as designing other novel ways of making use mobile devices in a secure manner in Mobile Health Care applications.The first solution addresses the challenges of low battery power on the smartphone of a Medical User by employing opportunistic computing. The solution makes use of Body Sensor Network nodes to capture health data from a patient, transfer the data via bluetooth to the patient’s smartphone, which in turn transmits the information via 3G networks to remote servers at a Healthcare Center. A proposed scheme uses a group signature authentication scheme composed of a medical users group and a medical personnel group to be used by patients and doctors respectively in the event that during an emergency the battery power of the patient under emergency runs low by using opportunistic computing approach. The group signature authentication scheme which is based on an RSA variant ensures that the privacy of the health information is controlled by the user, while a symptom matching scheme is used to control privacy. The scheme ensures user centric privacy of Patient’s Health Information. A detailed security analysis shows that the proposed scheme can withstand several kinds of attacks while at the same time achieving user centered privacy access control.The second solution focuses on the increase in number of digital signatures generated and the need to optimize the verification procedure of digital signatures. Currently, the DSA is one of the most commonly used digital signature scheme. This solution proposes an Optimized Mobile Health Care Batch Verification Scheme. The proposed design is based on a new optimal DSA-type digital signature scheme, which has also been proposed. Our scheme makes use of Small Exponents Test and Bucket Test subroutines for efficiency. The Scheme is secure against authentication threats, message integrity threats and replay attack threats.Lastly, we solve the problem of identifying good medical services by designing a privacy preserving secure reputation based medical services recommender system. This system enables Medical Users to get a reputation score of a Medical Service Provider before engaging in any services. Further, alongside the result of the query for the reputation score of the specific Medical Service Provider in question, the scheme also avails reputation scores of other relevant Medical Service Providers. This kind of approach ensures that the Medical User has some apriori information of the quality of service to expect from the Medical Service Providers and has a chance to choose the one with the best reputation from the ones presented. Our proposed scheme uses a variant of the ElGamal cryptosystem to preserve the anonymity of the Medical User making the query. Further, our scheme too ensures the privacy of the reputation scores submitted.In addition, extensive performance experiments using custom made Java code and other existing simulation tools show that our solutions perform better than existing designs addressing the same issues. The results of the first solution demonstrate the efficiency and effectiveness in terms of providing high reliable Personal Health Information processing and transmission while minimizing the privacy disclosure during a Mobile Health Care emergency. The second results show that our scheme is significantly more efficient in batch verification of digital signatures, making it a suitable practical solution to Mobile Health Care applications, while the third solution shows that our system is able to provide reputation scores as well as recommendation while preserving privacy as desired.
Keywords/Search Tags:Mobile Health Care, Privacy Preserving, Authentication, Reputation Based Services
PDF Full Text Request
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