Abstract
Blockchain is a key technique which can support Bitcoin. Blockchain is a decentralized infrastructure that uses chained data structure to verify and store data, and uses distributed node consensus mechanism to generate and update data. Blockchain has become a hot research topic since its attributes of decentralization, verifiability and anti-tampering. To stimulate the development of Blockchain, we conduct a comprehensive research on Blockchain. Specifically, we discuss various mainstream consensus mechanisms used in blockchain technology, and thoroughly analyze anonymity and privacy protection in digital currency. Aiming at data encryption mechanism, we discuss existing anonymity and privacy protection schemes. Our discussion can further promote the development of Blockchain.
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