Decentralized Data Storages: Technologies of Construction

Two Secure Anonymous Proxy-based Data Storages

Unidirectional proxy re-encryption (PRE) can be used to realize an efficient and secure shared storage. However, this type of storage does not yet protect its users’ privacy: to retrieve some data a user must give his identity and his query to the proxy. We propose two secure data storage systems that allow authorized users to anonymously get access to the content of encrypted data on a storage...

D$^2$: Decentralized Training over Decentralized Data

While training a machine learning model using multiple workers, each of which collects data from their own data sources, it would be most useful when the data collected from different workers can be unique and different. Ironically, recent analysis of decentralized parallel stochastic gradient descent (D-PSGD) relies on the assumption that the data hosted on different workers are not too differ...

Construction Of Decentralized Lifetime Maximizing Tree for Data Aggregation in Wireless Sensor Networks

To meet the demands of wireless sensor networks (WSNs) where data are usually aggregated at a single source prior to transmitting to any distant user, there is a need to establish a tree structure inside any given event region. In this paper , a novel technique to create one such tree is proposed .This tree preserves the energy and maximizes the lifetime of event sources while they are constant...

Mining Decentralized Data Repositories

Current technology for mining data typically applies to data stored centrally (i.e., in one single repository, homogeneous, with central administration, and a single schema). For instance, association rules algorithms assume that the data of interest is available at one location in a single table, or that prior to mining, the data will be warehoused centrally. However, it is important to study ...

Non convex technologies and economic efficiency measure with imprecise data