作者
Filip Hoffmann, Kristian Kostal, Lukas Mastilak
期刊
Transparent Reviews in the Online Space: Using Blockchain Technology and Distributed File Systems
简介
This paper proposes a transparent way of storing, sharing, and providing review data online. Reviews are becoming the leading source of information about products and services on the Internet. With this, the question arises as to what extent can review like this be trusted. Blockchain technology can solve the trustworthiness problem, ensuring that the review remains unchanged after submission to the blockchain. Further, with the increasing number of data stored in the blockchain, performance limitations and scalability issues gradually emerge. In our case, the solution to this problem is storing the review data outside the blockchain. The use of distributed file systems (DFS) will not limit the properties of the blockchain, and the use of so-called" Content-based addressing" provides the authenticity of stored data and its verifiability using a hash stored in a blockchain. This paper creates a generally applicable system design for review systems based on blockchain technology and distributed file systems. Proof of concept of this solution aims to collect and manage review data on academic courses between more universities to improve student feedback and awareness. The results show that downloading a review is faster than the upload operation. Because of consensus in the Hyperledger Fabric blockchain, the upload operation takes an average of 90 ms. The novelty of our system is no fee for processing the transactions, the compression of reviews for effective data management, and modular access control for users while still preserving transparency and decentralization.
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