Achieving reliable timestamp in the bitcoin platform
Achieving reliable timestamp in the bitcoin platform
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DOI：
10.1007/s12083-020-00905-6
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发表时间：
2020-05-13
影响因子：
4.2
通讯作者：
Zhou, Lu
中科院分区：
文献类型：
--
作者：
Ma, Guangkai;Ge, Chunpeng;Zhou, Lu
区块链是比特币加密货币的底层技术，是一项信息技术创新。区块链技术由于其公开性和不变性，被广泛应用于证据存储场景，用于证明某一时刻发生的事件。然而，区块链中的块的时间戳是由区块链节点引入的，可以在小时内进行操作。这要么会导致建立在区块链平台之上的证据存储系统失效，要么会增加区块链平台本身的双重支出风险。本文介绍了一种优化的区块链时间戳机制。我们通过利用区块链共识的外部信任时间戳服务，将块中的时间戳范围缩小到平均10分钟。最后，我们对所提出的方案进行了安全性分析。
Blockchain, the underlying technology of the Bitcoin cryptocurrency, is an innovation of information technology. The blockchain technology has been widely applied in the evidence storage scenarios to prove that an event occurred at a certain time due to its publicity and immutability. However, the timestamp of a block in the blockchain is introduced by the blockchain node and can be manipulated in hours. This will either lead the failure of the evidence storage system built on top of the blockchain platform or increase the risk of double spending of the blockchain platform itself. In this paper, we introduced an optimized blockchain timestamp mechanism. We narrow the range of the timestamp in a block to an average of ten minutes by leveraging an outside trust timestamp service to the blockchain consensus. Finally, we present a security analysis of the proposed scheme.