4,442 research outputs found
A Blockchain-based Approach for Data Accountability and Provenance Tracking
The recent approval of the General Data Protection Regulation (GDPR) imposes
new data protection requirements on data controllers and processors with
respect to the processing of European Union (EU) residents' data. These
requirements consist of a single set of rules that have binding legal status
and should be enforced in all EU member states. In light of these requirements,
we propose in this paper the use of a blockchain-based approach to support data
accountability and provenance tracking. Our approach relies on the use of
publicly auditable contracts deployed in a blockchain that increase the
transparency with respect to the access and usage of data. We identify and
discuss three different models for our approach with different granularity and
scalability requirements where contracts can be used to encode data usage
policies and provenance tracking information in a privacy-friendly way. From
these three models we designed, implemented, and evaluated a model where
contracts are deployed by data subjects for each data controller, and a model
where subjects join contracts deployed by data controllers in case they accept
the data handling conditions. Our implementations show in practice the
feasibility and limitations of contracts for the purposes identified in this
paper
Blockchain for social good: a quantitative analysis
The rise of blockchain technologies has given a boost to social good
projects, which are trying to exploit various characteristic features of
blockchains: the quick and inexpensive transfer of cryptocurrency, the
transparency of transactions, the ability to tokenize any kind of assets, and
the increase in trustworthiness due to decentralization. However, the swift
pace of innovation in blockchain technologies, and the hype that has surrounded
their "disruptive potential", make it difficult to understand whether these
technologies are applied correctly, and what one should expect when trying to
apply them to social good projects. This paper addresses these issues, by
systematically analysing a collection of 120 blockchain-enabled social good
projects. Focussing on measurable and objective aspects, we try to answer
various relevant questions: which features of blockchains are most commonly
used? Do projects have success in fund raising? Are they making appropriate
choices on the blockchain architecture? How many projects are released to the
public, and how many are eventually abandoned?Comment: In GOODTECHS 201
Blockchain Technology: An Analysis of Potential Applications and Uses
This paper will focus on explaining what blockchain technology is, the fundamentals of how it works, and applications of it. By utilizing sophisticated cryptography, a distributed network, a specified order of events the technology is able to create a ledger that cannot be altered due to its existence on many computers that able to detect if the data has been changed or tampered with. To help illustrate the uses of blockchain technology the technical explanation is complemented with real and hypothetical ways that the technology it being used. The use of blockchain technology originated with financial application and has expanded to many industries as new and creative ideas come to fruition
Performance Analysis of Blockchain Platforms
Blockchain technologies have drawn massive attention to the world these past few years mostly because of the burst of cryptocurrencies like Bitcoin, Etherium, Ripple and many others. A Blockchain, also known as distributed ledger technology, has demonstrated huge potential in saving time and costs. This open-source technology which generates a decentralized public ledger of transactions is widely appreciated for ensuring a high level of privacy through encryption and thus sharing the transaction details only amongst the participants involved in the transactions. The Blockchain is used not only for cryptocurrency but also by various companies to meet their business ends, such as efficient management of supply chains and logistics. The rise and fall of numerous crypto-currencies based on blockchain technology have generated debate among tech-giants and regulatory bodies. There are various groups which are working on standardizing the blockchain technology. At the same time, numerous groups are actively working, developing and fine-tuning their own blockchain platforms. Platforms such as etherium, hyperledger, parity, etc. have their own pros and cons. This research is focused on the performance analysis of blockchain platforms which gives a comparative understanding of these platforms
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