This paper studies blockchain technology - which is getting strong attention from the industry and also being applied in many fields. Based on the nature of blockchain's data security, we analyze the application of blockchain technology to deal with the problem of data integrity and transparency for text documents. Firstly, the paper presents an overview of some technology components constituting to blockchain and its relevance and optimization to the data authentication/protection problem. Next, an experimental application of blockchain to form a network which stores documents and maintains the integrity and transparency of documents stored in the network for external queries.
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