Titlebook: Blockchain and Trustworthy Systems; First International Zibin Zheng,Hong-Ning Dai,Xiangping Chen Conference proceedings 2020 Springer Natu

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A Global Clock Model for the Consortium Blockchainslobal clock service node is added. We use the Byzantine fault-tolerant algorithm to ensure the stability of the global clock node services. In addition, Cristian and Berkeley time synchronization algorithms are used to improve the confirmation of timestamp information, so as to achieve strong consis

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Histogram Publishing Algorithm Based on Sampling Sorting and Greedy Clusteringace error. To solve this problem, a histogram publishing algorithm based on roulette sampling sort and greedy partition is proposed. Our algorithm combines the exponential mechanism with the roulette sampling sorting method, arranges the similar histogram bins together with a larger probability by t

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Information Encryption Mechanism Based on QR Code This paper proposes an information encryption mechanism based on QR code to solve the problem of information leakage in data communication. The error correction mechanism of the QR code allows it to record information normally even if it is partially damaged. Taking advantage of this feature, this