Blockchain technology allows us to store data in a secure, transparent, and verifiable manner in so-called blocks, which are chronologically linked to each other in a chain using cryptography. The data is stored in a network of computers, which is decentralized and distributed. The main feature of blockchain technology is that no one can take over the ownership of the system, while anyone can use and co-manage it. To ensure correctness of data or transactions and achieve decentralized consensus, various mechanisms are used, which often require a lot of computing resources, which we cannot provide in certain environments, such as Internet of Things (IoT) and smartphones.
In this work, we explore the possibilities of using blockchain technology (and distributed ledgers in general) in computationally weak environments, review existing solutions and approaches, and compare them with each other. Based on the results, we choose the most appropriate approach and analyze and describe it in detail. Based on this, we setup and evaluate a network consisting of computationally weak devices (Raspberry PI) and a prototype application that communicates with this network and adds data to the blockchain.
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