In recent years,blockchain technologies have expanded from the finance field to other areas that rely on trustbased solutions.The healthcare industry represents one such area,as digital transformation disrupts relatio...In recent years,blockchain technologies have expanded from the finance field to other areas that rely on trustbased solutions.The healthcare industry represents one such area,as digital transformation disrupts relationships between patients,healthcare professionals,and healthcare institutes.Patients and healthcare institutes lack a proficient tool to verify the credentials of medical professionals in a digital environment.Furthermore,healthcare professionals lack a tool where they are in control over their credentials.The first contribution of this paper is a proposal of a solution that leverages the private permissioned Hyperledger Fabric blockchain and smart contracts to provide a source of transparent trust for relationships within the healthcare industry.Second,we pave the ground for GDPR compliance by storing only the hash values on the blockchain.Third,we solve the problem of patient authentication by utilizing cryptographic techniques.Finally,we prove the usability of the proposed solution by implementing a user interface and creating a live deployment.展开更多
Efficient data storage and query processing systems play a vital role in many different research areas.Blockchain technology and distributed ledgers attract massive attention and trigger multiple projects in various i...Efficient data storage and query processing systems play a vital role in many different research areas.Blockchain technology and distributed ledgers attract massive attention and trigger multiple projects in various industries.Nevertheless,blockchain still lacks the features of a Database Management System(DBMS or simply databases),such as high throughput,low latency,and high capacity.For that purpose,there have been many proposed approaches for handling data storage and query processing solutions in the blockchain.This paper presents a complete overview of many different DBMS types and how these systems can be used to implement,enhance,and further improve blockchain technology.More concretely,we give an overview of 10 transactional,an extensive overview of 14 analytical,9 hybrids,i.e.,translytical,and 13 blockchain DBMSs.We explain how database technology has influenced the development of blockchain technology by unlocking different features,such as Atomicity,Consistency,Isolation,and Durability(ACID),transaction consistency,rich queries,real-time analysis,and low latency.Using a relaxation approach analogous to the one used to prove the Consistency,Availability,Partition tolerance(CAP)-theorem,we postulate a“Decentralization,Consistency,and Scalability(DCS)-satisfiability conjecture”and give concrete strategies for achieving the relaxed DCS conditions.We also provide an overview of the different DBMSs,emphasizing their architecture,storage manager,query processing,and implementation.展开更多
文摘In recent years,blockchain technologies have expanded from the finance field to other areas that rely on trustbased solutions.The healthcare industry represents one such area,as digital transformation disrupts relationships between patients,healthcare professionals,and healthcare institutes.Patients and healthcare institutes lack a proficient tool to verify the credentials of medical professionals in a digital environment.Furthermore,healthcare professionals lack a tool where they are in control over their credentials.The first contribution of this paper is a proposal of a solution that leverages the private permissioned Hyperledger Fabric blockchain and smart contracts to provide a source of transparent trust for relationships within the healthcare industry.Second,we pave the ground for GDPR compliance by storing only the hash values on the blockchain.Third,we solve the problem of patient authentication by utilizing cryptographic techniques.Finally,we prove the usability of the proposed solution by implementing a user interface and creating a live deployment.
文摘Efficient data storage and query processing systems play a vital role in many different research areas.Blockchain technology and distributed ledgers attract massive attention and trigger multiple projects in various industries.Nevertheless,blockchain still lacks the features of a Database Management System(DBMS or simply databases),such as high throughput,low latency,and high capacity.For that purpose,there have been many proposed approaches for handling data storage and query processing solutions in the blockchain.This paper presents a complete overview of many different DBMS types and how these systems can be used to implement,enhance,and further improve blockchain technology.More concretely,we give an overview of 10 transactional,an extensive overview of 14 analytical,9 hybrids,i.e.,translytical,and 13 blockchain DBMSs.We explain how database technology has influenced the development of blockchain technology by unlocking different features,such as Atomicity,Consistency,Isolation,and Durability(ACID),transaction consistency,rich queries,real-time analysis,and low latency.Using a relaxation approach analogous to the one used to prove the Consistency,Availability,Partition tolerance(CAP)-theorem,we postulate a“Decentralization,Consistency,and Scalability(DCS)-satisfiability conjecture”and give concrete strategies for achieving the relaxed DCS conditions.We also provide an overview of the different DBMSs,emphasizing their architecture,storage manager,query processing,and implementation.
