ABLOC: Accountable Blockchain Logging for Offline Care

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dc.contributor.authorKrysl, Joseph
dc.contributor.supervisorWeber, Jens
dc.contributor.supervisorPrice, Morgan
dc.date.accessioned2023-09-22T18:00:14Z
dc.date.available2023-09-22T18:00:14Z
dc.date.copyright2023en_US
dc.date.issued2023-09-22
dc.degree.departmentDepartment of Computer Scienceen_US
dc.degree.levelMaster of Science M.Sc.en_US
dc.description.abstractRetroactive security is important to cyber security; it is used to hold people account- able for their actions [1]. In the medical world, it is difficult to assign proper privileges, as they can be too wide and vulnerable to misuse, or too narrow [1, 2, 3, 4] restricting access to patient data [2, 4]. Clinicians are often given wide privileges to ensure they can access the data required to care for patients [2]. Logging is relied upon to find breaches of policies [2, 3, 4, 5] but, without reliable logs, changes can be made to the data in the EMR without anyone knowing [6]. Blockchain-based logging has been proposed but requires a stable internet connection [7]. This thesis presents Account- able Blockchain Logging for Offline Care (ABLOC), a Directed Acyclic Graph (DAG) based blockchain, that is combined with a gossip protocol to improve the forensic re- liability and accountability of logs. ABLOC can tolerate participating realms, the internet space that houses one or multiple pieces of medical software, going offline, recovering, and resynchronizing with the rest of the network. The ABLOC system receives log hashes, summarizes them, and shares the summary with different realms on the ABLOC network. This work presents the necessary background information, discusses the design of the ABLOC system, and evaluates the proposed system the- oretically and with a prototype. The proposed system has promising results in the scalability tests performed.en_US
dc.description.scholarlevelGraduateen_US
dc.identifier.urihttp://hdl.handle.net/1828/15434
dc.languageEnglisheng
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectBlockchainen_US
dc.subjectLoggingen_US
dc.subjectElectronic Medical Recorden_US
dc.subjectForensicen_US
dc.subjectBlockchain loggingen_US
dc.subjectEMRen_US
dc.subjectEMR loggingen_US
dc.subjectOffline tolerant blockchainen_US
dc.subjectgossip protocolen_US
dc.subjectpeer to peeren_US
dc.subjectDAG Blockchainen_US
dc.subjectDirected Acyclic Graphen_US
dc.titleABLOC: Accountable Blockchain Logging for Offline Careen_US
dc.typeThesisen_US

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