Abstract: Aiming at the opacity of the current lottery system, a digital lottery issuance system based on blockchain is proposed. The most important feature of the blockchain are “decentralization” and “safe and transparent”, which perfectly fit the basic capabilities required by the lottery industry and future development. This paper introduces several key technologies in the process of building the lottery system based on blockchain, including the “decentralization” control of the winning number selection and the consensus mechanism, and the automatic execution of the smart contract in the lottery drawing process. Through these key technologies, this paper proposes the overall framework and concrete realization of a secure, reliable and decentralized lottery system based on blockchain, which technically solves the trust problem of the current Internet lottery system.

Key words: blockchain, lottery system, decentralization, security and transparency, consensus mechanism

摘要： 针对当前彩票系统的不透明性，提出了一种基于区块链的数字彩票发行系统.区块链最重要的特点本就是去中心化和安全透明，这完美地契合了目前彩票行业以及未来发展所需要的基础能力.介绍了基于区块链的彩票系统构建过程中几个关键技术，主要包括中奖号码选择的去中心化控制以及共识机制、开奖过程中智能合约的自动执行.通过这几个关键技术，提出了安全可靠和去中心化的基于区块链的彩票系统整体架构和具体实现，从技术上解决了目前互联网彩票系统的信任问题.

关键词: 区块链, 彩票系统, 去中心化, 安全透明, 共识机制