Blockchain adopts a chain data structure, and the characteristics of blocks that can only be added cannot deleted make total number accumulate over time, forcing resource-constrained nodes to become degraded in order alleviate increasingly severe storage pressure. Degraded store partial blocks, although improving scalability blockchain reducing redundancy will lead decrease availability. To add...

Centralized storage is a data model in which stored and managed single physical location or centralized system. In this model, all information are on servers centers by one entity organization. This also has disadvantages such as risk of system failure against distributed denial service (DDoS) attacks, natural disasters, hardware failures causing point failure. threat results loss lack user con...

The three traditional objectives of computer security are confidentiality, integrity and availability [8]. Availability can be defined as the prevention of denial of service. Confidentiality and integrity have been addressed in several theoretical works whereas the concept of availability has not been much investigated by the scientific community. This paper is an attempt to define through a ca...

This work introduces a model for decentralised and platform-independent data sharing for highly dynamic networks. The goal is not to deliver a solution that can be considered similar to database systems. Communication and replication challenges are presented and examined from the perspective of nomadic computing. The aim has been to provide highly available data sharing over features over mobil...

The three traditional objectives of computer security are confidentiality, integrity and availability [8]. Availability can be defined as the prevention of denial of service. Confidentiality and integrity have been addressed in several theoretical works whereas the concept of availability has not been much investigated by the scientific community. This paper is an attempt to define through a ca...

In today’s highly competitive business environment, for most companies it is imperative that their business data is always accessible from their data servers in a seamlessly fault tolerant manner. DBMSs, which constitute the core of most business information systems, are attempting to implement this requirement through a feature often referred to in the data management literature as ‘high avail...

Utility mining has recently been an emerging topic in the field of data mining. It finds out high utility itemsets by considering both the profits and quantities of items in transactions. It may have a bias if items are not always on shelf. In this paper, we thus design a new kind of patterns, named high on-shelf utility itemsets, which considers not only individual profit and quantity of each ...

0 Abstract The increasing popularity of cloud storage services has led many companies to migrate their data into clouds for high availability whilst saving infrastructure constructions. Within the last few years, the architectures of most major cloud storage providers have evolved from single data center to multiple data centers, across different geo-locations. This architecture help improve th...

Journal of Research and Practice in Information Technology, Vol. 32, No. 3/4, August/November 2000 181 We propose a new replication control scheme for mobile systems. Replicating data at multiple sites could contribute to enhance the availability regarding the distributed data. Replicating data, however, inevitably induces the burden of maintaining replica consistency which requires more comple...