Browsing by Author "Pinto, Rui Pedro de Oliveira"
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- A System for The Promotion of Traceability and Ownership of Health Data Using BlockchainPublication . Pinto, Rui Pedro de Oliveira; Silva, Bruno Miguel Correia da; Inácio, PedroWith the development of more and better globally connected mobile devices and thanks to improvements in wireless connectivity, it became possible to utilize the capabilities of mobile devices to monitor healthrelated events in realtime, making mhealth a technology more appealing and functional. mhealth enables the monitoring of health data, improving user convenience and enabling faster diagnoses without the need to travel to healthcare facilities. Blockchain technology is also an exponentially growing technology used in various research areas from finance, voting mechanisms, production chains, and even for IoT event control. A Blockchain can be described as a group of recorded transactions organized into blocks, where each block is linked to the previous block cryptographically. The use of these records of transactions grouped into blocks does not allow the modification of the stored information due to being secured by the cryptographic hash of the previous block. This technology provides important characteristics as immutability, nonrepudiation, transparency, and reducing the need for intermediaries. These features provided by Blockchain technology grant huge advantages to mhealth systems. A mhealth system integrated with blockchain allows each access and transaction to be stored in the blockchain thus providing immutability and nonrepudiation to these transactions increasing the trust in the mhealth system. This dissertation aims to study the blockchain technology in conjunction with mhealth system, capable of being easily integrated with other systems or applications allowing a patientuser to access his electronic health record. The data should be traceable throughout the system but maintain the necessary anonymity. For this end, a prototype for a blockchain based solution using Hyperledger Fabric was developed to be applied in this case. This implementation enables the creation of a chronologically organized and immutable health data record. To create an anonymous storage system, the proposed system uses two separate database components that maintain data traceability through sets of IDs stored in the blockchain. After, the development of the proposed system, the system was evaluated in terms of performance and network configurations of the Hyperledger Fabric. This work shows how the Blockchain can be used in junction with health data collected by mobile devices, in an advantageous manner, in contexts where security, anonymity, and immutability of data are crucial aspects.